How long has your tank been cycled? How long have they been in the tank? Any other tank mates?
Thanks C -
Short answer, no other tank mates (except snails) and tank has been up for over a year, in some form.
Long answer, its a little bit of a long story...tank has been set up for about a year, 14 gal, HOB, spiral fluorescent 6700K lights, Seachem fluorish, and DIY CO2. Growing Anubias (not sure what species) glosso (kept growing straight up) Vals (unsure of species) and Moss ( you guessed it, unsure of species) in pebbles.
Then...switched to EcoComplete and Current USA PC 2x40w - plus pressurized CO2 had some tetras, RCS, otos and a couple cories, things were good and growing, plants were pearling, etc.
THEN...disaster!!! 2 yo turned off powerstrip when i was away...CO2 kept pumping (i leave it on at night) and we lost about 70% of the fish. those that recovered were ok. then a couple weeks later, same 2 y.o. dumped a bottle of Fluorish Iron into tank and a bottle of fluorish, wiping out the rest of the fauna.
So I took most of the water out, added new, and ran tank by itself (just flora) for 4-5 weeks.
Added RCS on Monday (4 days ago). They seem sluggish compared to old ones. Too much CO2? I have a Red Sea Drop Checker, but in the past, even when green, I changed the solution and it was yellow...
Thanks for all your help/input