Home: KOI Talk: Pond Construction & Water Filtering System:
DIY PP Bead Filter



FrankChong
User

Apr 18, 2001, 7:00 PM


Views: 116001
DIY PP Bead Filter

Earlier on I have posted a photo on DIY sand filter. This PP Bead Filter is an improvement over the sand filter.

PP stands for Polypropelene, I call it PP Bead because the plastic bead used is Polypropelene bead. It has a relative density of 0.92 (or so) so it floats.

Water would be drawn from the pond and pumped to the bottom of bead filter. It filters through the beads and come out at the top of drum. The five valves are there to enable filtration, backwashing and rinsing.

The advantage it has over the sand filter is obvious. The beads are light and it floats, when backwashed the fish waste could easily be dislodged and drain off from the bottom of the filter.

If your existing pond is having green water problem try using this filter as your prefilter. Pump the water through PP bead filter first and then discharge it to your existing bio filter. It should cure the problem.

If it is intended as stand alone filter, I have no idea what size of pond it could support at this moment. This is new, I am trying it out on a 1000 gallon pond. I will be able to give feedback in a couple of months.

One word of caution, please allow the beads to be soaked for 4 weeks and clean off regularly any residual chemical it may have left behind during the bead manufacturing process.


Khoobg
Webmaster


Apr 18, 2001, 8:06 PM


Views: 115871
DIY PP Bead Filter

   










(This post was edited by Khoobg on Jun 4, 2002, 9:00 AM)



Geo Mar
Novice

Apr 18, 2001, 8:28 PM


Views: 115879
DIY PP Bead Filter

I am very happy to do one like this. What is beads? got picture to see?


FrankChong
User

Apr 19, 2001, 5:35 AM


Views: 115870
DIY PP Bead Filter

The beads is polypropelene plastic bead. It is use as raw material for plastic injection moulding.

The beads are the white colour stuff in the drum.


ngyp
Novice

Apr 19, 2001, 7:21 AM


Views: 115871
DIY PP Bead Filter

Hi Frank,

Is this type of filter more effective as a Mechanical or Biological filter ?


FrankChong
User

Apr 19, 2001, 8:09 AM


Views: 115870
DIY PP Bead Filter

This filter is more effective as mechanical filter. Its ability to trap solids is very much better compared to Japanese mats.

If your present filter system is under capacity, it would be ideal to use the bead filter to trap most of the waste and discharge it daily. Leaving whatever fine waste particles that escape this filter to your existing filter.

However, same as sand filter, the bead filter must be backwash on a daily basis to dislodge the waste. Otherwise you will observe the water being filtered will reduce to a trickle. It is possible to make it to have automatic backwash function, but it will cost a bomb not advisible.

While this size of bead filter can work effectively as prefilter for a 20 ton pond. I would only recommend for a 1000 to 2000 gallon pond if use alone.


stevenc
Novice

Apr 22, 2001, 9:19 PM


Views: 115870
DIY PP Bead Filter

FrankChong,

That's a very interesting piece of DIY Filter.

Can you please tell us where we can get the beads and if there are different sizes of beads. and the cost.

Maybe you can let us have a drawing showing the water flow cos the piping looks complicated in the picture.

If you remember, you were the person who first directed me to build a filter and the trickle filter that I built was a success.

Thanks


FrankChong
User

Apr 23, 2001, 7:34 AM


Views: 115871
DIY PP Bead Filter

I will post schematic drawing later to illustrate the working principle.


Khoobg
Webmaster


Apr 24, 2001, 10:59 PM


Views: 115872
DIY PP Bead Filter

 


Khoobg
Webmaster


Apr 25, 2001, 3:49 AM


Views: 115875
DIY PP Bead Filter

Frank,

What is the size of pump you use to feed pond water through this filter ?


FrankChong
User

Apr 25, 2001, 6:38 AM


Views: 115869
DIY PP Bead Filter

The above diagram shows the working principle of bead filter.

1. For normal filter operation, turn valve F to on position. Close all other valves. For bead filter, water enters through the bottom and come out from top of drum. ( Top Photo shows the version water enter from the top and discharge at the bottom. )

2. To backwash turn valve B to on position, off all other valves. Duration 2 to 3 mins

3. To rinse turn valve F near inlet and valve R to on, turn all other valves off. (Duration 30 seconds)

The pump use is Omni by Tsurumi of Japan. Standard low head pump. Flowrate is good.
Polypropelene beads could be purchased from small factories doing plastic injection. Titan in JB manufactures Polypropelene, ask them for their distributors and dealer. If you have difficulties send me an email, I could pull a string. If you look into yellow pages you can find plenty of them doing plastic injection.


dennis yu
New User

Apr 29, 2001, 5:46 AM


Views: 115869
DIY PP Bead Filter

Hi Frank,

What do you mean by "turn valve F near inlet". Pls elaborate further.

thanks,
Dennis YU


FrankChong
User

Apr 29, 2001, 9:06 AM


Views: 115870
DIY PP Bead Filter

There are 2 valves marked F. One at the filter outlet and the other at the filter inlet.

For rinsing operation you turn the valve F at the filter inlet and valve R to ON. Turn all other valves OFF.


dennis yu
New User

Apr 30, 2001, 4:39 AM


Views: 115872
DIY PP Bead Filter

thanks frank.


alecb
New User

Sep 7, 2003, 1:57 AM


Views: 114400
Re: [FrankChong] DIY PP Bead Filter

Excellent piece of DIY, excuse my ignorance, but can you tell me what percentage of the drum is filled with the PP beads, and what size is the drum, do you need the lid air tight on the top.

I understand that this is your only mechanical filtratration in your system? And would it be possible to have a flow of 15000 Litres.

Thanks in advance for sharing your efforts with us.


koi aku
User

Mar 14, 2005, 7:06 PM


Views: 108070
Re: [FrankChong] DIY PP Bead Filter

Hi Frank,

I am using the drum as my filter container. It was done back in 2002 and it works fantastically until now. The difference is only on the complicated piping attached to the drum. It is such an exellence effort.

Would u care building one for me. I ll bear all the costs and sweat.

Bach


dho
New User

Mar 15, 2005, 3:00 PM


Views: 108038
Re: [koi aku] DIY PP Bead Filter

Does anyone know who sells these PP beads or do you have to be in the plastic moulding industry?


allau
New User

Jul 17, 2005, 7:06 PM


Views: 104924
Re: [FrankChong] DIY PP Bead Filter

I have read your DIY PP Brad Filter with much interest. I like to build one my self and try some water jets to automate the wash process. But before I start, would appreciate you can advice me where can I buy the PP Bead. I stay in Koto Damansara P.J. Thanks.


larz1
Veteran


Aug 11, 2005, 1:52 AM


Views: 104178
Re: [FrankChong] DIY PP Bead Filter

I've been curious to hear how your PP bead filter is performing. It looks and sounds like it has much potential. Any progress reports to give to the forum?


FrankChong
User

Aug 16, 2005, 11:33 AM


Views: 103927
Re: [FrankChong] DIY PP Bead Filter

Oops, you woke me up from my hibernation. This filter was done 4 years ago for my neighbour's 1000 gallon pond. Since then I have found a new hobby, been trying hard to keep my handicap low.
Ok, since then I have made some improvement to the filter. I have enlarged the inlet and discharge pipe inside the drum to much bigger pipe. As this filter is the only filter for the pond, the pump sometimes suck up leaves and algae and get clogged in the pipe. By enlarging the inlet and discharge pipe inside the drum chances of pipe clog has been reduced. Another improvement made was to enclose the submersible pump in the settlement with japanese matt so that no large debris could be brought into the filter thereby eliminate pipe clogging problem.

The filter remains in working condition, pond clear as ever.


GCSpyder
Veteran


Aug 16, 2005, 11:53 AM


Views: 103921
Re: [FrankChong] DIY PP Bead Filter

Hi Frank,

Glad to hear that you are out of your slumber. Wanted to contact you in the past but could not reach you via pm as yours is not activated. You can check that under your profile.

Essentially what I automated my flushing system, similar to your setup but encountered alot of problems with leaking at the solenoid valves due to clogging. I have since replaced with actuated ball valve. Works well so far.

Is your system still running?

Cheers..


FrankChong
User

Aug 17, 2005, 4:13 AM


Views: 103887
Re: [GCSpyder] DIY PP Bead Filter

I replaced my solenoid valve quite a while back. Now I am using 2 inch diameter stainless steel ball valves with electric actuator. It is timed to open for 1.5 minute every morning at 7.00 am. Everything cleaned while I am still in bed. If there is a malfunction I would notice it during feeding time at 8 am. So far no problem.

I have used solenoid valves in projects related to tap water. But first time in fish pond. The pilot hole regulates the opening and closing of valve keep fouling up. Finally got fed up with weekly cleaning I replace it with ball valves.


GCSpyder
Veteran


Aug 17, 2005, 6:29 AM


Views: 103877
Re: [FrankChong] DIY PP Bead Filter

Hi Frank,

Good to hear from you. I replaced the solenoid valve for the same reason that you are encoutering. I replaced it with a Georg Fischer electric ball valve. Like the colour too. Smile I am still flushing 3-4x times a day on timer. The first time is the same time as yours at 7am. Unlike you, I will be at the pond admiring the flushing. Tongue



Cheers..


ja10son
New User

Dec 7, 2005, 11:03 AM


Views: 101429
DIY PP Bead Filter

CrazyCan anyone help me? Where can I get those propylene beads in Kuantan? I'm planning to build a PP bead filter by this year end. Thanks in advance.


lcs
User


Dec 14, 2005, 4:57 AM


Views: 101249
DIY PP Bead Filter

hi koi lover,
since u have done this. can i know how much u bough this PP bead? come in sand pack or count in kg? thanks in advance..


ja10son
New User

Dec 14, 2005, 5:51 PM


Views: 36828
DIY PP Bead Filter

Thanks anyway for those who tried to help me with buying pp beads. I got them last friday from Kuantan Plastik Sdn. Bhd. in Semambu industrial area. They use it as raw material. Bought it at RM5 a kg.

SOme questions for the koi lovers out there
How much do you normally buy it ?
What's the usual price?

I'm new here, so can you give some opinions on this mechanical filter system i'm building?

DOn't know where to get barrels so i am using 20 litres plastic paint pails.
i am using two of them ( more surface area, i think) connected parallel.
for each of the pails
1" inlet at bottem with elbow to give a bit of vortex effect.
Next is plastic netting which beads can't pass through.
10cm of pp beads
ANother plastic netting which beads can't pass through.
1" outlet at the top to biofilter with japanese mats.
1" drain outlet at center of pail bottom ( lower than inlet) as drainage with a valve.
When backwash, open the drainage valve and spray from above, through the top netting until clean.

The PP bead filter diagram above shows that a net is fitted on a inlet pipe, but i plan to put a net above the inlet, not around the inlet. Same goes to the netting before the outlet. i thought that like this it will be easier to remove the dirt stuck on the netting while backwashing. Am i right?

And why do you put so much pp beads into it? i plan to put only 10cm in thickness of those beads between the nettings. Did you put that much to make it a biofilter too? Does it work as a standalone filter?

Thank you in advance.


neutokoi
User

Dec 16, 2005, 9:30 AM


Views: 36785
Re: [ja10son] DIY PP Bead Filter

Hi,
I am having the PP beads around 40 - 60 cm, the reason is to have more surface area for the bacteria to grow, but my filter design is different from yours, I use a modified version of sand filter.

Rgds,
Edo


ja10son
New User

Dec 16, 2005, 5:16 PM


Views: 36762
Re: [neutokoi] DIY PP Bead Filter

some help here. so does the beads work as an effective mechanical filter that is easy to wash?
currently my pond is very dirty, full of filth. the water is very green, when it gets hot during
daytime the water will be full of dirt particles at least 1mm and larger and visibility less than a foot.
but i don't worry much as there are only malaysian carps in it. anyway the japanese mats in the filter will
always clog up with dirt and i wash it weekly ( that's why i think it is uneffective).Today, i just only finished the bead
filter system i described. ran it for a few hours. quite dissapointed with results. from far the filteres water is clear but from near i can see small particles, very small. these green unfiltered particles gathers near the outlet ( i mean some of it, most of it went to the outlet), clumped together and guess what, later i found bubles around them. correct me if i am wrong but i think that is pure oxygen made from photosynthesis of the algae which clumped together. so is this good or bad? i am still afraid this small particles will clog up the jap mats like before. thank you for answers in advance


k_rul98119
New User

Apr 13, 2006, 4:14 AM


Views: 36158
Re: [ja10son] DIY PP Bead Filter

Hi, do you all know where can i find pp beads in KL or Seremban area? The filter has been constructed. Only searching for the medium



aquasystech
New User

Aug 14, 2006, 6:10 PM


Views: 35409
Re: [dho] DIY PP Bead Filter

You can find the beads you're interested in at Aquaculture Systems Technologies. Please Cal 5048375575 or visit http://www.beadfilters.com .. my name is Scott. Please let them know I refered you.


fishteacher
New User

Aug 29, 2006, 2:50 AM


Views: 35311
Re: [FrankChong] DIY PP Bead Filter

Hi Frank,

I am a science teacher and through the grace of networking between friends, I have come across you design for the PP bead filters. You have used a drum with a lid, but I only have access to drums with closed head that you have to cut off. What kind of pressure is the filter under and do you have to have a lid that snaps or screws on? Please advise as this could be a welcome addition to out high school aquaculture program. You also said that you increased the pipe diameter for the in/outlets, what size did you move up to? Any help on this would be greatly appreciated.Smile


stoneone25
New User

Aug 31, 2006, 9:37 PM


Views: 35265
Re: [fishteacher] DIY PP Bead Filter

do you have the drum with two holes in the top one being for a 2" threaded and the other a 2" bung
plug. you could use 3" uniseal. Then for the inside you could get a 3" to 2" bushing going to a 2" pipe.
that way you could still drill the hole and put your screen around your pipe and it would be able to go
into the 3" uniseal. then on the outside of the barrel you could go with either another 3" to 2" bushing
or reducer. a pvc reducer fits over a 3" pipe while a bushing fits inside of the pipe after you fill with
beads put the two plugs in the top of the barrel. the only differance would be you would have a short
piece of 3" pipe goin thur the barrels then changing to 2" on both sides. a uniseal is a rubber gasket that
don't need any glue. you just push it in and it will seal itself.


fishteacher
New User

Aug 31, 2006, 10:14 PM


Views: 35259
Re: [stoneone25] DIY PP Bead Filter

Does this version of the filter lay on it's side? I have seen that version, but as I am in a school, I am very concerned about the possibility of a leak. The vertical version would be best for our application. Can this idea work vertically?


stoneone25
New User

Sep 1, 2006, 6:27 PM


Views: 35237
Re: [fishteacher] DIY PP Bead Filter

it can be used for either one. where you see the bulkhead fittings in the pics you would use
3" uniseal fitting. to install the 3" uniseal you would have to use a 4" holesaw. put the seal in
and push the pipe thur. you would have to use a 3" to 2" bushing. it will fit inside the 3" pipe
and the 2" pipe will go into it and should give you enough space to be able to put the screen on
then push it thur the uniseal.


georgeemang
New User

Nov 7, 2008, 10:26 AM


Views: 28204
Re: [Khoobg] DIY PP Bead Filter

Mr Chong,
My name is george. I am a new member of this forum. I have been searching the internet on how to build a biological filter for my pond. Now i roughly know how to do it. My question is where can we buy these "good" bacteria in Malaysia? I have asked few Aquarium shops in Miri Sarawak, and none have it. Is it really necessary to buy these special bacteria or our pond will naturallyand eventually supplies its own bacteria?


mifa
New User

Feb 9, 2009, 8:23 PM


Views: 26818
Re: [FrankChong] DIY PP Bead Filter

Forgive me for bumping this old thread back up, but I wanted to share something. I made a filter like this and it has worked well. However, I wanted to improve it so I could go out of town longer. Basically I made a knock off of the polygeyserFilter. Its a self cleaning bead filter.

Points of interest:
Cleans its self each day into a large storage drum to be dumped when I get to it.
The beads are low density polyurethane which float.
Inlet pipe are cut many times like a well screen.
The air pump is a deep water pump
The pump air pump is on a timer so that it only cleans once per day.
Can provide bio filtration for up to 2 pounds of feed per day.
Has a 800 GPM flow rate through 1.5 inch pipe(3 would be better)
Uniseals are the only way to go, makes it so easy to build.
Has been in operation as sole bio/mechanical filter for 4 months now.
A commercial version to process this much waste was going to cost over $4,000.


To see it in action see http://www.youtube.com/watch?v=k7qwbRfMrf4#
I had to remove the start of the video and change the name of the filter. Seems the manufacturer does not want me posting this info; so if this video gets removed you will know what happened.

Operation:
Once a day air is pumped into the lower drum. When the air gets to the bottom of a looped tube the air dumps into the upper barrel when the bubbles break up the beads and release trapped solids. The dirty water is sucked down in the lower barrel releasing the air where over a period of time the solids settle to the bottom where they can be drained off easily.


quezon1
New User

Mar 7, 2009, 4:22 PM


Views: 26330
Re: [mifa] DIY PP Bead Filter

hello mifa,

your filter design is interesting. been trying to build one like that for years. I was wondering how the air release part work?

Questions.

1. how do you collect the air? When you pumped air in doesnt it get released thru the dirty out valve?
2. Assuming it doesnt how do you prevent air from going up the dirty water out valve (the valve connecting the 2 drums)?
3. How do you dump all the air collected at the lower drum all at the same time.
4. Once air is dumped how do you purged it from the top barrel? do you just let the air out the water outlet back to the pond?

thanks for any advice. it would certainly save me lots of time

charles


sekkei
New User

May 12, 2009, 6:43 AM


Views: 25405
Re: [FrankChong] DIY PP Bead Filter

HI, I'M NEW TO THIS FORUM AND HAVE BEEN RESEARCHING RC POND DESIGNS ONLINE. SO FAR THE MOST HELPFUL IS SACREMENTO KOI.COM. THEY HAVE COMPLETE DESIGN FROM WHICH YOU CAN DETRACT A BIT. I'M PLANNING TO BUILD A RECTANGULAR POND OF DIMENSIONS 25' BY 8' BY 4'. ALSO WANTING TO HAVE IN PLACE 2 4" BOTTOM DRAINS, GRAVITY FED SKIMMER WITH SEPARATE COLLECTING BOX, FILTER, BEAD FILTER, GLASS FILTER, UV AND WATER JETS.
I DON'T KNOW WHERE TO PURCHASE THIS ITEMS IN KUALA LUMPUR. WOULD PREFER TO BUY THEM OF THE RACK THAN TO DIY. ANY GOOD BRANDS , SPECIFICATION OF PUMP POWER? PLEASE HELP.