I got about 15 neons about 8 months ago, and I'm down to 7. I found 2 dead, or what was left of them before the other fish and the snails got to them, but no signs of the others over the last few months. I had about 9 platys, am down to 4, but never found any of them. Momma platy got dropsy and died in December, and this week we moved out a female betta that was in this same tank & quarantined her to a fishbowl, also with dropsy. The rest of the fish are new or going on a year old.
My tank is a 45g fw
tank and the water is well oxygenated with a 12" bubble wand. All the chemical numbers are great, currently a little high in nitrate at around 20, but the rest come out great; ammonia 0, nitrate 0, pH is 7.5. I change the water weekly, by about 25 - 33% and vacuum the substrate as well. I feed them sparingly, enough for them to consume before much of it hits the bottom. But they get fed almost daily. I am wondering if the frozen red worms i give them as treats about 2 or 3x a week could harbor some kind of parasite, even though it says its been sterilized. ????
So why can't I get some of the fish to live more than 6 months? the frog, pleco, catfish, ramshorn snail, & male platy all survived an ammonia bloom(?) last year and like the rest of the fish, all seem to be fine, but these other random fish just up and die for no apparent reason.
What is a fish's lifecycle?