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 

Thanks for any help.