if youre talking about Modesta's and not some dye injected botia, my 4 do great in 75-82 and i have varried my temps over the last year from 72-82 seeing where the majority of the comunity liked it best... honestly, they seemed a little bit more active in slightly cooler (aprox 73F) temps. then again, ive changed structure alot recently as well and that is most likely the reason they have become less active is because they have many more places to pile up and hide now.