My fifty gallon has had a change of up to .50 in just about two days!
The first day, I did 40% w/c and te second day I did a 50% the next day.
Always use decholrinator, my water is soft, these are my fish as of right now are nine guppies, fry of all ages, five cherry barbs [more in qt to join them] nine pristella tetras five albino cories, four emerald , and three spotted cories. and a rubber nose pleco. Also six ghost shrimps and two apple snails.
I am aware of the guppies need for hard water, though mine are generations born locally, and have seemed to have no other signs of distress.
But what concerned me was that one of my male gups was sitting on the ground, which the males never do. Also along with three mothers, who are about to give birth, we're five about three month old fry, just sitting, and they are never just sitting!
I tested the water it was above .1, but not much. The next morning, I did the 40% w/c and tested it that might, and got about .25. So the next morning I did a 50% w/c and tested it later it was almost .50!!
I added the cories about a week and a half ago, but before that, I had added the none pristellas an the guppy adults at the same time, 18 fish [emergency] and there was no rise in ammonia, just cloudiness. I wouldn't think 12 cories would change te ammonia that much, or a week after introducing!
My tank has four or five big water sprite plants, "big mamas" I call em. I recently pruned them, and took all the babies off, could the loss of the growing baby plants take up that much ammonia? Do the big momma plants use up less ammonia that smaller plants?
The only thing I've done is put some more smaller plants in the tank, and I'll test in the morning and see if there's a change...
Anyone have any ideas??