I am want to try a couple of farlowellas in my 45g high tank. The tank is populated by a shoal of C. Arcuatus and 4 medium angels. I am assuming that farlowellas like the same soft water and relatively high temperatures (75-80 F). Are farlowellas hardy fish, say compared to ottocinclus? Do they school? I am thinking of getting a couple, but if I need to get at least 4, for example, I'll have to rethink my tank's capacity. Thanks for any help. Tom