So since last weeks water change my temperature has gone up to almost 90, which is way too high obviously and i didn't realize it until todays water change when i put my hand in and the water was incredibly warm, now my question is when i fill it up what temp shoud the water be my fish are doing well suprisingly and i don't want to stress them anymore so i wanna slowly decrease the heat of the water so should i put in water thats the same temp????