Hey guys I have had great results with these sponge filters. I currently have about 20 of these just laying around. I use them from my native tank to my platy farm and my water is clear and constant 0 ammonia. I would recommend a strong air pump to power it tho.
http://www.ebay.com/itm/K1B-Hot-Sal...269095304?pt=Fish_Filters&hash=item3a80ce1f88
At a little over 2 bucks how can you go wrong haha.
http://www.ebay.com/itm/K1B-Hot-Sal...269095304?pt=Fish_Filters&hash=item3a80ce1f88
At a little over 2 bucks how can you go wrong haha.