I have 1 honey gourami, 5 endlers, and 4 cherry shrimp in the 9 gal fluval flex. The shrimp seem to just hide behind the rock ALL DAY. Seriously, I never see them out. I always make sure to get some food back there for them at feeding time. They all seem to be doing pretty well. My parameters are 0, 0, and 20. (PH is 7.2) I've had them for about 2 weeks. Is this normal shrimp behavior or is something wrong? Also, I'd love to hear recomendations on growing java moss. Mine seems to be growing out in strings, but still very slowly. Thank you!