i been wondering, what if you have sand, not gravel, does your piranha pair "need" to blew/ dig or what not to get a nesting area? im askin cause i dont have gravels, i have sand. what would help my p's? plus is it ok if the powerhead is on when there breeding?what type of surrounding do most pair spawn on? have they ever laid eggs on the sand? please reply, it would help me alot
