i just finished my 10g sump for my 55 gallon tank, but have one problem. i dont have anything to use instead of bioballs. ive got the chamber to hold the media, but dont know what to use in it thats extremely cheap or even free. so my question is, what could i use as a bio-ball substitute?
btw, the chamber to hold the bioball sub is roughly 4g
btw, the chamber to hold the bioball sub is roughly 4g
