I made a filter like this for my first tank about 4 years ago. i was 13years old. it was the only thing running my 55gallon, it was roughly 600GPH after the 5"s of head hieght and resistance. Let me know what u guys think sense i plan on trying this again for my 30 gallon. pretty much a 3" piece of PVC stuffed with media, capped on both ends and both have 1/2" connectors allowing 1/2" vinly tubing, one inlet and the other an outlet. hooked up to a powerhead, the water is forced through all of the media...
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