What is a safe temperature for a community tank 190L i did have it at 28C all fish were happy then someone said that was too high so i turned it down to 25-26C now my plecs wont come out and my 2 blue sharks just at the bottom of the tank and hardly move.
I have a 70L and my temperature stays around 26C. Your best looking to see what temperature is best suited for the particular fish you have in your tank.