yep my discus are at 30 deg lol i never get any evaporation,
ive got a few fish in my tank all of which have been in there over a year which have been ok at 30 deg, but wanted to know what fish should always be kept at 30 deg
what i know is
hatchet fish
discus
serbi corys
rams ( but i removed my rams as they did not like my discus)
i got told densel barbs (torpedo barbs) but not sure but they have been fine in me tank..
in my tank are
hatchet fish
common plec
densil barbs
red tail black shark
head stander
clown loach
serbi corys
and some big catfish carnt remember the name