I’ve had him for a little over a week, nearly two weeks now and I have only noticed my betta start flashing when I came home from work. He flashed 4 times but it wasn’t consecutive. Other than that, he’s been doing amazing and is a really active, curious betta and eats well (I’ve only been feeding him 3 HikarI pellets two times a day... tried giving him freeze dried bloodworms that were pre-soaked but he spat it out). The only thing that’s happened is that he ripped his tail on something or he nipped at it, but it’s healing back slowly. A day after him ripping his tail, is when I noticed the flashing.
I’ll attach some photos of him. He doesn’t look to have anything visibly wrong (no white spots, no raised scales).
I’d also like to add that he is in a 20L/5gal temporary tank while his 65L/17gal tank is cycling. The 20L/5gal tank isn’t fully cycled, but I have been testing the water every other day (every 2 days to be exact). I have been completing 25-30% water changes every time the ammonia goes above 0.25 ppm.
I’m just wondering what might be bothering him and if I could diagnose it early so it doesn’t get too bad.