All my betta fish seem to get sick and die. My paremeters are good 0ammonia 0nitrite 5-10nitrate. I have 4 10gal and 2 5gal tanks. I have live plants in all of them. They're all heated. Yet all my bettas get fin rot. I don't know what I'm doing wrong i'm so frustrated and sad. I've had 2 bettas die on me and one probably about to die. 1st i think fin rot? Idk man, he went all lethargic one day, i was giving him salt baths and i put him in a quarantine tank, he died a few days later (had him 1 month) The second one got epistylis, died the next day (i had him 1 week). Third one i believe was also fin rot? That i couldnt cure no matter how many catappa leaves and salt baths i gave, i believe that eventually led to dropsy, and he is in treatment but i think i have accepted defeat already. It brings me so much pain. And my other bettas 2 seem ok so far but one has fin rot already:( all my tanks are cycled i read so many forums to make everything perfect and yet here we are. Should i just quit? Am i just really bad at this? Idk man. Also i ask in so many groups but i get so many different answers i wish i knew an expert that could help me, but even my lfs worker told me to use melafix for fin rot which i have now learned sucks for bettas. Anyway. Thanks if anyone reads this, i just wanted to vent. Pic of my 10gal for reference.