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DIY Micro Strainer...

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Koi38
Senior Member

Jan 19, 2006, 2:28 PM

Post #1 of 55 (3295 views)
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DIY Micro Strainer...	Can't Post

Hi Guys/Gals,

After a long researched, I finally decided to make a micro strainer. Got this idea in another koi forum Wink

.

Size is 26cm in diameter and 30cm in height. This will go in my settlement hoping it will reduce my maintenace a lot more Wink

Purpose of this strainer is to stop the micron waste going into prefilter. If this thing works, I will convert my prefilter to another bio unit Smile

This unit will suit if you have a blue drum filter or even a square chamber. The unit will rotate by vortex effect and also with the aid of the backwash system Wink

So its a self cleaning unit Cool

Materials for strainer:
1 x 8L bucket with a snap on lid, 1 x S/S 280 micron screen, silicon, expandable foam and a piece of 10cm pipe as sleve.

Materilas for Backwash unit: (Will get later on)
20mm pipe, some elbows and a tee and a 3000Lph pump.

Here you can see the rim of the bucket is being cut by a hack saw. This will be the top part of the unit. You'll see what I mean later on Wink

I cut the actual lip off the bucket, this will be used later on too Smile

This is the lid and will be used as the base. You can see the marked of 10cm pipe. This is the right side up Smile

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

(This post was edited by Koi38 on Jan 19, 2006, 4:10 PM)

Koi38
Senior Member

Jan 19, 2006, 2:53 PM

Post #2 of 55 (3280 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Con't...

The lip that was trimmed before will be used to hold the stainless steel screen on the base. It's like closing the bucket with the lid. You just place the screen on the lid and push in the lip, instead of sticking it with a glue. You can undo the lip if you need to adjust the unit if its too high Cool

I thought I took a pic before I put them together but I didn't Pirate

Anyway, here's how this unit look like. I still have to glue them.

This shot is upside down showing the 10cm sleeve getting fix on the bottom of the unit. The sleeve was heated up to expand a little to create clearance in the stand pipe. The actual size of the sleeve is 11cm in diameter.

This is the right side up Smile

This is almost done. All I need now is to work on the backwash unit Unsure

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

(This post was edited by Koi38 on Jan 19, 2006, 4:05 PM)

Koi38
Senior Member

Jan 19, 2006, 3:18 PM

Post #3 of 55 (3276 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Con't...

Here you can see the expandable foam was applied. I have to wait for 24hrs before I can trim it. Puorpose of this foam is to make the unit floats and will follow the water level Smile

I will post more pics tomorrow when I trim the foam. Will try this in my settlement see if I have to adjust anything.

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

GCSpyder
Koi Addict

Jan 19, 2006, 6:44 PM

Post #4 of 55 (3262 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Looking great, Jon. Nice stuff! Will be following this thread.

Koi38
Senior Member

Jan 19, 2006, 7:22 PM

Post #5 of 55 (3257 views)
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Re: [GCSpyder] DIY Micro Strainer... [In reply to]	Can't Post

Hi GC,

Thanks man.....................long way to go yet Unsure

I'm still waiting for some parts for the backwash system Smile

Any comments bad or good are all welcome Wink

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

koi@kit
Senior Member

Jan 19, 2006, 10:22 PM

Post #6 of 55 (3256 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

master cifu..

very impresive.. love to copy this as i got a lot of the white plastic container..(something in common again Wink

)

one thing thou.. will the strainer need a lot of maintenance? i might be wrong.. will follow ur post and see the results. tks.. Smile

drcheang
Koi Lover

Jan 20, 2006, 12:17 AM

Post #7 of 55 (3250 views)
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Re: [koi@kit] DIY Micro Strainer... [In reply to]	Can't Post

Hi Jon,
I like this project. Question is where to get the microscreen? I actually had a link to a website from this forum long ago about microscreen. The only problem is that I cannot get hold of microscreen n thus I do the fine particle filtration in a vortex by puting jap mat near the water outlet in my vortex n it works wonders. But need to clean the jap mat every week Frown

. I hope to put microscreen in my vortex once I can get hold of the microscreen.
Cheang

Koi38
Senior Member

Jan 20, 2006, 1:41 PM

Post #8 of 55 (3218 views)
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Re: [koi@kit] DIY Micro Strainer... [In reply to]	Can't Post

Sifu Kit,

I'm still working on the backwash system which will clean the screen, so no maintenance really Cool

. The backwash system has to work properly though or else the screen will get clog so easy Pirate

Anyway, I trimmed the foam this morning with a hack saw.

It should look like this. I applied a thin layer of silicon on the foam to protect from deteriorating Cool

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

Koi38
Senior Member

Jan 20, 2006, 1:53 PM

Post #9 of 55 (3216 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

I did a test today and its a bit too high. That means I have to pull it apart and trim the screen. At least I'll get a chance to show the lip of the drum and how it will hold the bottom part of the unit.

Thats the advantge of not gluing the bottom part(lip and lid), if you have to trim the screen, you can always pull it apart. Once you're happy then you can glue it permanently . Just like what happened to me

Here is the bucket lip.

The lip will be pushed in the lid

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

(This post was edited by Koi38 on Jan 20, 2006, 3:37 PM)

Koi38
Senior Member

Jan 20, 2006, 2:14 PM

Post #10 of 55 (3215 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Its time to put it back togethert again Unsure

First, turn the lid upsidedown then slide in the screen where the lip will sit in. I will be using a screw driver to push the lip inside the bucket lid. See pic below Smile

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

Koi38
Senior Member

Jan 20, 2006, 2:23 PM

Post #11 of 55 (3213 views)
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Re: [drcheang] DIY Micro Strainer... [In reply to]	Can't Post

Hi Cheang,

It took me a while to find a S/S screen locally.

I just searched the net in my area and found one only, but its good enough for me Cool

It cost me $35AUD incl delivery Smile

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

Koi38
Senior Member

Jan 20, 2006, 2:46 PM

Post #12 of 55 (3209 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Screen test run again, this time its very good. Floats better and rotates faster Cool

I am now toying with backwash system. This is my first idea but you'll need a good pump to make this work Crazy

By getting the right pressure coming out of the slits, technically this screen is maintenace free Angelic

The water spraying the screen outwards pushing the waste to the side of the settlement and should drop to the bottom for easy flashing. Smile

Well that's the idea, until then I have to toy around Tongue

Note: Placing the spray pipes in an angle will help rotates the screen if you don't have a vortex effect in your settlement. You will need at least 2 spray pipes for this to work

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

(This post was edited by Koi38 on Jan 20, 2006, 3:40 PM)

drcheang
Koi Lover

Jan 20, 2006, 6:08 PM

Post #13 of 55 (3197 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Dear Jon,
Where about in Australia r u? I m in Malaysia but I m due to arrive in Melbourne next week for 1 year. Where can find things for Koi in Melbourne?? Guess I wont be seeing my pond n fish for 1 year. I need to find pond liner cos it is almost impossible to find anyliner in Malaysai. I may buy in Australia n sent back to Malaysia via freight.
Cheang

Koi38
Senior Member

Jan 20, 2006, 6:19 PM

Post #14 of 55 (3191 views)
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Re: [drcheang] DIY Micro Strainer... [In reply to]	Can't Post

Hi Cheang,

I'm in Sydney. I'm not sure if there are Koi Supplies in Melbourne but you can buy supplies in internet. The link is the one I always use, they are very professional and reliable, they are in WA. They have everything exceot koi Tongue

You can also buy your micro screen here if you want Cool

Pond supplies Wink

http://www.creativepumps.com.au/

Drop by in Sydney when you have spare time, its only 8hrs drive Shocked

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

canuckpuck
Koi Lover

Jan 21, 2006, 5:10 AM

Post #15 of 55 (3173 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Koi38 you've done it again!!! I will definitely use this in my filter! Can you show us the backwash system in action? and how exactly does it rotate?

Koi38
Senior Member

Jan 21, 2006, 2:55 PM

Post #16 of 55 (3159 views)
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Re: [canuckpuck] DIY Micro Strainer... [In reply to]	Can't Post

Hi CKK,

I'm still working on the backwash system. The slits on the pipe are too big and spary action no good. Until I'm happy with it I'm gonna keep on toying with. Will try again tomorrow Smile

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

Koi38
Senior Member

Jan 22, 2006, 8:04 PM

Post #17 of 55 (3120 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Hi All,

Here is my backwash system in test mode Wink

. You'll notice that one pipe has 4 slits and the other has 3 slits. I had same slits originally but they it will not clean the screen properly Unsure

so I staggered them like this _-_-_-_ this way with right pressure it should clean the screen well Smile

. The water in this bucket was actually rotating, pic didn't do justice Crazy

I even had to put a rope on pipe to stop it from rotating. I will try to fit this tomorrow if I can and let you all know the results Wink

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

(This post was edited by Koi38 on Jan 22, 2006, 8:10 PM)

drcheang
Koi Lover

Jan 23, 2006, 1:57 AM

Post #18 of 55 (3106 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Dear Jon
I think ur back wash the pump is too strong
Try cut the slits straight down, narrower and use the slower flow pump. Also nearer to the screen
Take a look at this web site
http://www.koiboard.com/koi/mechanicalfiltration/microstrainer.htm
Cheers
Cheang

Koi38
Senior Member

Jan 23, 2006, 8:39 AM

Post #19 of 55 (3094 views)
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Re: [drcheang] DIY Micro Strainer... [In reply to]	Can't Post

Hi Cheang,

The slits that I made are working perfect Cool

I'm running it for about an hour now and so far its working Smile

I thought about the pump but thats what I got atm and plus the stronger the pressure the better, but I might get a smaller pump later Wink

Btw that's where I got my plan from that link Smile

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

Koi38
Senior Member

Jan 23, 2006, 9:20 AM

Post #20 of 55 (3088 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Hi All,

Here is another pic, the microscreen is in testing and running for about 2 hrs now and its good Cool

. Water level in the next chambers(prefilter and biofilter) have dropped a little as expected but its stable Smile

The screen rotates anti-clockwise.

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

Koi38
Senior Member

Jan 23, 2006, 3:27 PM

Post #21 of 55 (3079 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Hi All,

I've finally completed my micro screen today. The only difference from the previous post(top pic) and the new once is I placed the pump inside the screen Wink

.

rgds,
Jon

The pump and the spraybars comes as one unit Cool

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

Koi38
Senior Member

Jan 23, 2006, 3:40 PM

Post #22 of 55 (3077 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Hi All,

Just incase you want to see the screen at work, here a small video Cool

If you look closely on the top right corner of the vid you'll see crap get pushed to the side of the chamber and eventually drop to the bottom. Also I just focused on the pump to show where it is Laugh

Its been running since this morning and so far it hasn't clog yet Cool

http://www.zippyvideos.com/7664922303370946/screenday2/

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

(This post was edited by Koi38 on Jan 24, 2006, 8:44 AM)

neutokoi
Koi Lover

Jan 27, 2006, 10:25 AM

Post #23 of 55 (2959 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Hi Jon,
Sorry for my stupid question Unsure

...I started to confuse when I saw the final product that has the pump inside the micro stainer, it means you are using the inlet for backwash/drain also,originally I thought the water inlet is from the pump, the 10 cm PVC pipe in the middle is just for backwash. With the case that you have the pump spraying from inside the stainer, there is a possibility that you are pushing the debris out of the micro stainer, will it be better if you have the pump outside the stainer, and at the sametime you move the spraying pipe to outside also, they are spraying from outside to inside, exactly the same concept but spraying the fish waste back into the pvc pipe?

Cheers,
Edo

Koi38
Senior Member

Jan 27, 2006, 12:44 PM

Post #24 of 55 (2956 views)
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Re: [neutokoi] DIY Micro Strainer... [In reply to]	Can't Post

In Reply To

Hi Edo,

Hi Jon,
Sorry for my stupid question Unsure

No such things Wink

I started to confuse when I saw the final product that has the pump inside the micro stainer, it means you are using the inlet for backwash/drain also,originally I thought the water inlet is from the pump, the 10 cm PVC pipe in the middle is just for backwash.
Water comes directly from my BD gravity feed to this settlement chamber. The 10cm pipe is a tranfer pipe that goes to the next chamber. So the water comes from the outside of the screen, 280 micron waste or larger get trap by the screen. The screen rotates at 8.7rpm with the aid of the spraybars, these push the crap to the side of the settlement and drops to the floor for flushing. The pump inside the screen is for backwash purpose only, nothing else.

rgds,
Jon

"DuKu Friendly"
_____________________________________
"No one is ever too old to know better"

http://s3.photobucket.com/albums/y63/Koi38/

andymadd
Koi Lover

Jan 28, 2006, 2:45 AM

Post #25 of 55 (2932 views)
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Re: [Koi38] DIY Micro Strainer... [In reply to]	Can't Post

Hi

Most Impressed 10/10 you have a homemade Answer. I have a real answer in a nexus and every 6 months or so you have to clean the screen with Caustic Soda as Bio film clogs the holes and belive me the C Soda is the only thing that shifts it. So keep an eye on you water levels in a few months.

Andy

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