Flanagan001 Posted November 16, 2013 Report Share Posted November 16, 2013 I always thought a fish tank must have gravel but I now know this is not always the case, Looking for opinions: Tank size 6x2x2 I have a breeding pair and their fry of Red Devils, should I have: 1) no substrate 2) have sand 3) have shale 4) have gravel What's best? Tank size 3x1.5x2 My other tank has a breeding pair of green terror and their fry. Same question, what's best? Link to comment Share on other sites More sharing options...
RJHELL Posted November 16, 2013 Report Share Posted November 16, 2013 Personal choice really. But i have found with gravel i dont get PH spikes and any other nastys like that. Both have their up's and downs. Link to comment Share on other sites More sharing options...
