it's a sand substrate, but I'm only running a 20 watt above it, and the tank has lots of driftwood and backs to a dark wall. I had floating hygrophilia in there in a giant mat until yesterday, when I got tired of the hiding fish and the horrible way the plant looked. As long a the fish weren't coming out, why should I have to look at the stuff, you know? They do actually seem more active since I pulled it out. I dunno. I was thinking maybe water lettuce as a floater, but I can't find any locally. I'm keeping an eye on the classifieds here for some.
I think one of the local petco's (ugh) has bleeding hearts. I'll swing by there and one of our local pet supply places. I'm not thrilled about buying fish from either one, honestly, but the tetra's seem to hard to find more of. My LFS can only order what thier suppliers have in stock, and they haven't seen them on the list for months. I'd like more of the cories too, but the one's I saw last week were really, really pale and just kinda sitting there in seperate corners, not doing the cory thing. I'm not sure I know enough to be buying sick fish. . . .Although I did okay with whatever hit the big tank last weekish, so maybe I should set up a Q and risk it anyway?