I do weekly water testing on three 5-gallon betta tanks. Ammonia & nitrites consistently test 0 ppm for all three tanks. I do 25 - 30% water change only once weekly, and about 25% water change plus gravel vacuuming once weekly, on all tanks. Filters in all tanks, creating small current, but all 3 fish do fine with current.
Oldest fish, Baggins, I got last November. He's fine. Female (Beans) I got same day as Barley, and Beans also is doing fine. Same feeding schedule, amount, food, etc.
Barley's fins are not exactly clamped, but not fully open either, when he swims. No changes in any of the tanks, no new filters, decorations, no new food, no new light schedules, etc. Just a very sudden change in behavior.
Thanks, Anna. I asked Hannah in a subsequent question, and she suggested I ask you, you had mentioned some fish are sensitive to the electromagnetic waves from computer, microwave, TV etc. I hadn't heard that before.
The tank was directly across from my computer, which is on most of the day and much of the evening. Should I be relocating the tank? How would a fish be reacting if TV etc. is an issue? Just wondering, for the welfare of future tank inhabitants.
Thanks. I didn't find anything when I googled this, so I appreciate the link to the study.
Thanks for your help. I've cleaned the tank and hope to have better luck with my next fish once the tank is ready again.