08-31-2008, 09:29 AM
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I found your filter online. You can use this filter as a biological filter, which is good. To accomplish this, you will need to allow the sponge to grow bacteria, which means that you should never rinse the sponge under tap water. Bacteria are the key to successful fishkeeping, and the sponge is very capable of providing a permanent place for these bacteria to grow.
My suggestion is this. Every month or so, when doing your weekly water changes, use this opportunity to clean the sponge. Just squeeze the sponge out in the bucket of dirty aquarium water. Don't do any elaborate cleaning, just gently clean the sponge with water from the aquarium. This should keep the sponge from clogging and allow water to flow freely threw the sponge, allowing the bacteria to break down ammonia and nitrite.
You should probably wait at least 2 or 3 months prior to the first cleaning of the sponge. Also, with the limited capacity of this type biological filter, you need to be very careful not to overstock your aquariums fish load. I would suggest no more than 5 or 6 small fish, along with a pair of Cory Cats for cleanup.