It depends on the needs of your fish. I keep my tanks at 76 for my community fish although the water does get warmer than that during the summer months. Some fish require specific temps. If your fish would be comfortable at cooler temps then it would be okay.If I were to lower it to 76, per se, would that be totally okay?
Just some thoughts for you if you are catching flack for wasting water or will for having 3 buckets of water sitting in the bathroom. I don't catch flack but I do hate wasting perfectly good water.It's a pain to have to get the faucet temperature to match the aquarium temperature. So much water is wasted.
I bought 2 more buckets last night to aid in water changes. I'll fill them up a few days before a water change and toss them in my bathroom, where the room temperature is higher than the rest of the house.
Sorry for jacking your thread. I found this interesting
Something I forgot to mention before. The water changes with a bit cooler water may prompt your corys to start laying eggs. Mine normally don't need prompting thoughI have a community with Serpae Tetras, swordtails, and albino Cory cats. From what I know, 76 lies in a comfortable range for everyone.