Hi guys, I noticed today my blue gourami has "bumped" his head on I imagine an ornament I do have other guoramis in the tank but have never had an aggression problem. He now has a white patch on the top of his head about 5 mil round. No sign of infection as yet, but I would guess it is a recent accident as I keep a pretty good eye on them. I am unsure as to whether I should up the temperature (currently 28 degrees - due mainly to outside temperature being 35+, it is normally a little cooler) or decrease the temperature which could prove difficult. Should I do daily water changes and if so what amount (76 US gallon tank with 4 adult guoramis, 6 danios, and 3 pygmy corys), or should I medicate the tank as a precaution? Unfortunately my quarantine tank is unavailable, so I would need to treat whole tank. Any advice would be much appreciated. Thanks.