Hi I have a 60 gallon tank with 3 pretty good sized (about 4-5 inches w/o tail) Pom Pom Orandas in it. I have been reading for days about gravel and impaction risk and have not gotten any seriously solid information. What I want to know is, is Carib Sea - "Rio Grande" gravel (3mm-5mm) safe and/or good for my orandas as far as size and shape. I'm sure this type of question has been asked a million times and I swear I've read each one. Alot of times people say medium or #2 or pea sized or fine or none or alot of other vague definitions or measurements, I will happily remove the substrate if it isn't good, but it was fairly expensive so I'd like a pretty solid answer. Someone please help!