DIY Sponge filter - The Planted Tank Forum
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post #1 of 18 (permalink) Old 06-05-2011, 04:04 AM Thread Starter
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DIY Sponge filter

I am wanting to make my own small sponge filters for my 10G planted tanks and in preparation for a CRS breeding tank.

I have chosen to use PVC pipe as my main tube and then your basic tubing found at Petsmart for the air to pass through.

The problem I am running into is finding foam. I've heard Open Cell Foam works well, but I really can't find any cheap. Does a sheet or portion of this foam exist under $40? I don't need to make a ton of filters, just a good handful, but I don't want to spend so much on just the foam.

I have gone to Hobby Lobby, Michael's, Roberts, Lowe's and Home Depot. Only Home Depot and Lowe's had a type of sponge in the paint/flooring section that would work, I just didn't check to see if was treated with an anti-bacterial ingredient, or whatever it's called. The other stores only had Styrofoam stuff.

Do any of you have some alternative suggestions or ideas for me that is cost effective?
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post #2 of 18 (permalink) Old 06-05-2011, 04:57 AM
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Is there a specific reason to make your own? Because if you're trying to save money, I'd just buy some sponge filters, they generally around 5 dollars each, or if you buy from china you can get them for 2 each shipped.
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post #3 of 18 (permalink) Old 06-05-2011, 05:02 AM
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Go to the dollar store and get some sponges that you wash your car with! They work great! good luck.

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post #4 of 18 (permalink) Old 06-05-2011, 05:38 AM Thread Starter
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Quote:
Originally Posted by mordalphus View Post
Is there a specific reason to make your own? Because if you're trying to save money, I'd just buy some sponge filters, they generally around 5 dollars each, or if you buy from china you can get them for 2 each shipped.
I want to make my own mostly to say I did. But also to avoid the problem of baby shrimp getting sucked up in a over the top filter.

Where would I get the $5 foam at though? Do you know of a store? I can't find one, that's why I ask.
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post #5 of 18 (permalink) Old 06-05-2011, 05:42 AM
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go to e_bay and search for "sponge filter replacement sponge"
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post #6 of 18 (permalink) Old 06-05-2011, 05:58 AM
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You might try looking at foam prefilters. Search for that and you'll find many online. There are pre-made shapes to fit over various filter intakes, but it sounds like you'd prefer a block to cut up yourself. I did too, and bought this:

http://www.thatpetplace.com/pet/prod/207312/product.web

It's open cell, and a larger pore size than any foam/sponge I can think of from the hardware/craft/dollar store; which improves flow and reduces cleaning requirements. Provides good biological filtration. I like it.
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post #7 of 18 (permalink) Old 06-06-2011, 12:53 AM
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Purchase an AquaClear filter sponge replacement.
I use the generic ones from Big Al's, to replace or create sponges media for all my filters.
post #8 of 18 (permalink) Old 06-06-2011, 01:02 AM
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Not seeing the ones for $2 each shipped.

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post #9 of 18 (permalink) Old 06-06-2011, 01:12 AM
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Quote:
Originally Posted by mordalphus View Post
Is there a specific reason to make your own? Because if you're trying to save money, I'd just buy some sponge filters, they generally around 5 dollars each, or if you buy from china you can get them for 2 each shipped.

You think a guy who goes by Studman buys his filters?
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post #10 of 18 (permalink) Old 06-06-2011, 03:39 AM Thread Starter
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You think a guy who goes by Studman buys his filters?
No, stud's get things done themselves instead of relying on someone else doing it for them! haha
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post #11 of 18 (permalink) Old 06-07-2011, 06:49 PM
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i have been using the car washing sponges for years. Cheap and effective. Look at the Dollar store,

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post #12 of 18 (permalink) Old 06-08-2011, 01:09 AM
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I'm using the fluval edge prefilter sponge on powerheads for a 10g and a 3g tank and it works very well. I don't know that I would do this for an unplanted 10g but in a planted tank it appears to be more than sufficient. $2.50 each and they fit over the inlet for most any small filter or powerhead...
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post #13 of 18 (permalink) Old 06-08-2011, 01:29 AM
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Just saw this in another thread, it looks like what you're after, though the price is rather higher than a dollar store car sponge.

Poret foam
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post #14 of 18 (permalink) Old 06-08-2011, 01:41 AM
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How about $2.79 per double sponge filter?
I did a search for "sponge filter" on eBay, clicked on Buy it now, and found the first listing to be double sponge filters for $1.00 each. Shipping is $1.79.
They ship from Hong Kong and should be here in a week or two.
post #15 of 18 (permalink) Old 06-08-2011, 09:02 PM Thread Starter
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Originally Posted by jasonpatterson View Post
Just saw this in another thread, it looks like what you're after, though the price is rather higher than a dollar store car sponge.

Poret foam
Yeah the Poret Foam looks like it would work great, he just charges so so much. I am willing to spend some money, but not that much. Thanks though.
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