This problem seems to be in all of my aquariums. I have 11 aquaruims from 55 to 3 gallons. I dont usually test for nitrite unless something goes wrong & most of my tanks dont have filtration, no filters whatsoever (except the african featherfins in the 55 g & the baby grow out tanks.) They have small populations or are breeding tanks (w/ one pair of fish) and all of them have tons of plants. The SA & US tanks are on rainwater over peat.
Whatever this is has been happening for a while. The fish loss was a one year old male Apistogrammoides in January. The three gallon aquaruim has US natives in it who are displaying the same problems as the rest of my fish at home so i thought that now might be a good time to try and finally get rid of it.
The specific tank I have with me (I'm at school right now) has 7 fish 3/4-1/2 an inch in it; Its a 3 gallon eclipse. Yup, I know its temporarily crowded, but they were kinda a sudden acquisition. The water conditions posted were for it. I saw the hydra in this tank last year (i thought it was strange that they were bright green), but this tank was stripped, cloroxed, and sat empty all last summer. I dont know if they are resilient enough to have withstood this.
I was thinking about moving off rainwater but RO
is expensive and a 30 min drive one way & we have a well so you cant get the water as soft. I dont know how much of a difference it makes but I usually wait a day after it starts to rain before I start collecting.
... goat dewormer, in what amount?