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

 




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ja10son
New User

Dec 14, 2005, 5:51 PM

Post #26 of 38 (36827 views)
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DIY PP Bead Filter [In reply to] Can't Post

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

Post #27 of 38 (36784 views)
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Re: [ja10son] DIY PP Bead Filter [In reply to] Can't Post

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

Post #28 of 38 (36761 views)
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Re: [neutokoi] DIY PP Bead Filter [In reply to] Can't Post

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

Post #29 of 38 (36157 views)
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Re: [ja10son] DIY PP Bead Filter [In reply to] Can't Post

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

Post #30 of 38 (35408 views)
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Re: [dho] DIY PP Bead Filter [In reply to] Can't Post

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

Post #31 of 38 (35310 views)
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Re: [FrankChong] DIY PP Bead Filter [In reply to] Can't Post

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

Post #32 of 38 (35264 views)
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Re: [fishteacher] DIY PP Bead Filter [In reply to] Can't Post

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

Post #33 of 38 (35258 views)
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Re: [stoneone25] DIY PP Bead Filter [In reply to] Can't Post

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

Post #34 of 38 (35236 views)
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Re: [fishteacher] DIY PP Bead Filter [In reply to] Can't Post

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

Post #35 of 38 (28203 views)
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Re: [Khoobg] DIY PP Bead Filter [In reply to] Can't Post

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

Post #36 of 38 (26817 views)
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Re: [FrankChong] DIY PP Bead Filter [In reply to] Can't Post

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

Post #37 of 38 (26329 views)
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Re: [mifa] DIY PP Bead Filter [In reply to] Can't Post

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

Post #38 of 38 (25404 views)
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Re: [FrankChong] DIY PP Bead Filter [In reply to] Can't Post

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.

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