Originally Posted by Shotzer
I prefer my flakes as they are mixed with bits of brine shrimp, shrimp meal and fish meal as the top three ingredients and a 48% min crude protein rating, as Betta are exclusively carnivorous. He is not near a window or drafts and the house is in a warm climate. His vet approves of his habitat and told me to use bottled spring water for his tank as our tap water has always killed fish even with bowl prep. He is feeling much better today, I turned off his air filter, after I realized it was circulating water much to fast and causing a harsh current, which is why he'd been hiding under the filter. He seems much happier today, but the change in scale color and nodules still worry me. Waiting to hear back from the vet.
I understand what the vet said, but he/she is wrong about the bottled water. Tap water contains ESSENTIAL minerals in it that bottled water simply does not have. If you must use bottled water, you need to get an additive to the water that adds these minerals (different from conditioner/de-chlorinator). In that small of a tank I recommend at least 2-3 weekly water changes of 100%, ammonia builds up very fast in tanks 1-2 gallons. Like the others have said, try to keep the water at least at 76.
Flakes can have high protein and good ingredients, but pellets are generally recommended more because they do not dirty the water as much and are easier to feed a proper amount.
I believe your fish is suffering from ammonia exposure. You really need to increase your water changes and find some usable tap water. Your betta really needs the minerals that tap provides.