Ideal Aquarium Temperature For Tropical Fish. Below 68F 20C Tropical fish. A few species need to be kept several degrees warmer and some species require temperatures a few degrees cooler.
Keep your fish tank away from bright sunlight. This is NOT by any means set in stone though however this temperature range covers the most tropical fish at a comfortable temperature. A good range is 76 to 80F 25 to 27C.
The best approach to working out which is the best temperature to keep your tank at is to do some.
Too much sunlight can cause algae growth. Too much sunlight can cause algae growth. Tropical fish make the majority of them though. A wider range of temperatures often overlapping the above categories.
