Super cheap DIY canister filter - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 01-16-2009, 01:25 PM Thread Starter
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Super cheap DIY canister filter

I play around this lock n lock canister jar to make a super cheap canister filter. I cannot guarantee that this would work for extended time before it fails (leak), but initial testing proves it does not leak even at 3 feet worth of water pressure. To be safe, you would want to run this one pararel to the tank level.

I reckon you can do it for less than $10.
The downside is, you dont have a pump placed in the canister. All the water source have to be pumped from main tank. A pump inside the canister would cause in great risk of leaking due to extra hole for power line not properly secured by just using silicone or glue gun.

The pictures explains it all

Lock n lock canister jar, 4L size


Plumbing components


Some of the equipments (most homes usually have them)




Top side secured




Bottom part secured




Done


Testing


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post #2 of 12 (permalink) Old 01-16-2009, 01:42 PM
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Why not use an external pump above the filter body, like the eheim classics do?
Say for a smaller tanks i know maxijets (depends on how low you have it because head height and all) would work, just have a line going through the canister being gravity fed then out the canister to the pump ?


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post #3 of 12 (permalink) Old 01-16-2009, 03:25 PM Thread Starter
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I have just tested it using bucket, some hose and a powerhead to feed the canister.

Turns out the stock canister cap is not as strong as I have tested conventionally, without proper sealing and water input of course. At just 20-30cm below the bucket (translates to 60cm of water pressure or so), the cap begins to leak. Sure the plumbing does not fail meanwhile as these are designed to handle much higher pressure.

Sadly, I must say this one does not work as well as it looks. You just need to keep it level with the main tank, and it should be safe. I ran it for 15 minutes and nothing leaks. I will be running this one as such for my holding tank. Nothing goes to waste


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post #4 of 12 (permalink) Old 01-16-2009, 03:36 PM
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http://cgi.ebay.com/ws/eBayISAPI.dll...ayphotohosting Can you find a container like this one here? If you can get your hands on something like this then you dont have to worry about leaks. The site says you can buy these at a hardware store but ive never seen one around here.
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post #5 of 12 (permalink) Old 01-16-2009, 04:26 PM
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I tried the same thing. Using the same type of container. I tested it by filling up my utility sink and putting the container on the floor. The pressure blew the lid right off.

To use a setup like this it would have to be on the same level as your aquarium.

High Tech:
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post #6 of 12 (permalink) Old 01-16-2009, 04:27 PM
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Quote:
Originally Posted by chuukus View Post
http://cgi.ebay.com/ws/eBayISAPI.dll...ayphotohosting Can you find a container like this one here? If you can get your hands on something like this then you dont have to worry about leaks. The site says you can buy these at a hardware store but ive never seen one around here.
I tried to find a bucket like this, but have had no luck so far. That with a couple bulkhead fittings would be good.

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post #7 of 12 (permalink) Old 01-16-2009, 05:24 PM
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you could go with a 5 gal bucket with http://www.kaboodle.com/reviews/scre...uckets--5-pack

it'd be too large for smaller tanks, but big tanks could do this nicely methinks!
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post #8 of 12 (permalink) Old 01-16-2009, 05:34 PM
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post #9 of 12 (permalink) Old 01-16-2009, 07:53 PM
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The drum in the eBay picture is an Olive shipping container. Find a Greek store and ask them what they do with their olive or mushroom drums. Somewhere between 2 to 4 gallon.

Five gallon buckets are made to contain product that isn't under pressure. Unless you weld the top portion of that screw top lid to the bucket, it can pop and leak. Probably while you are on vacation.

Look for a stainless steel pressure cooker at a thrift shop. Seals are easy to replace and they are already tapped or vented on top.
post #10 of 12 (permalink) Old 01-16-2009, 08:16 PM
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Unless you weld the top portion
precisely what I was thinking of doing. Some sort of epoxy to form a permanent bond or something. It's already supposed to be airtight, but that would assure that as well.

Not sure if I trust my crafstmanship with stainless steel to get a nice tight seal there either with the holes drilled for ins and outs.
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post #11 of 12 (permalink) Old 01-16-2009, 08:31 PM
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Lightbulb

This may seem a bit obvious but instead of pumping water into the canister you will be better off letting the water siphon into your canister (intake) and then have a pump outside the container on the (outflow) to pump water into the tank. This eliminates the problem of pressure building up in the canister and blowing the lid off. I tried it your way and blew a few diy canisters out before I looked at it and moved the pump. Worked fine after that. I have since started using a square plastic kitty litter pail.

--marrow

Last edited by marrow; 01-17-2009 at 04:45 PM. Reason: spelling
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post #12 of 12 (permalink) Old 01-20-2009, 03:43 AM
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on a nano operation where it's 2 feet below the tank, and the pump is say a maxijet being used out of the water but pumping water back to the tank, sitting on top of the body, i think it might work, or would the container blow ?

Because compared to a nano canister such as the zoomed or the tom rapids, how does the pressure hold up ?


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