so I noticed that my new guy (had him for a month and still unnamed... i'm an indecisive person lol
) was losing his beautiful green color and turning light blue-gray, so I did a water change, and yesterday I went to petsmart and bought omega one betta buffet flakes which say they have "salmon skin to enhance color" and a 10w heater, as the water temp is only like 73°F, and I thought maybe that's why he was looking sickly. (it is preset, but shuts off at 78°F) and guess what? IT WORKED! his color is turning back to emrald green and he's more active! maybe I'll invest in a better, adjustable heater eventually, 'cause for 17 bucks idk how long it'll last, but for now, it'll do.