the only fish i've kept are bettas. i've told this story in posts before, but like the other few members here i wasn't doing it very well. it wasn't intentional, of course, but my mother and i could've researched beforehand and we didn't. they were put in either a small little "betta tank" that was part of a kit or in little bowls. no heating, no filtration, and they were rarely cleaned. just about a year ago i found out what i had been doing whilst getting into researching other animals as well and rushed to get my current betta into a bigger spare tank my brother had used for his bearded dragon when it was younger. sadly i didn't ever manage to treat his illnesses that probably came from the store conditions and/or my own care, though he did last a really long while with them. nothing wanted to work, and i'm not sure why. a month or so ago i came home and when i went up to his tank he didn't swim up to see me. normally he would because i had been covering his tank with a towel (for velvet) as well as fasting him (for bloating of some kind?) and he would know when i was there. i immediately knew what happened, and after searching for a minute there he was, completely gone. i feel horrible still, but in fretting over him and even having him pass possibly due to my own irresponsibility, i've learned a lot. learning about bettas led to me learning about other fish as well, and i'd honestly love to have a planted freshwater community someday, though it would be a while. it's been a tough but interesting experience.