Just bought the 29 g Bio Cube. I know that I am supposed to ditch the bio balls, but do I put anything in its place? And, what about the sponge filter and carbon filter, do I ditch them also? And will the stock pump have sufficient flow?
Sponges can collect lots of garbage but they need to be rinsed every so often. Carbon is cool cuz it'll absorb other garbage and help with water quality, also needs to be replaced every so often.
<a href=showthread.php?s=&postid=8896948#post8896948 target=_blank>Originally posted</a> by joe_patterson what exactly is the trouble caused by the bio balls?
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