Thanks that's helpful. I have 3 Neon Tetras left (2 of whom died) + 1 black stripe Tetra+ 1 Black Phantom TetraI would still test the KH first see what you are dealing with. I see you have some tetras they do like the pH to be lower, you have a new tank so it still needs to mature and the pH will come down a bit. Any changes in pH need to be slow for the fish, so for the moment wood and leaves are good. pH has a logarithmic scale so from 7 to 6 is 10 times more acidic.
Yes it's a 20G (24x12x16). I realize now that I should not add anymore fish for quite a while. I was under the (mistaken) impression that adding the Safestart meant that I could go ahead and fully stock my tank. Adding too many at once was almost certainly my mistake.Just in case you don't know... don't get more fish until the tank is fully cycled. All of those tetras are schooling fish that need to be with at least 7 or 8 of their own species. Are you sure the tank is a 20 gallon? On the picture it looks just like a 10 gallon to me?
Ok, thanks for the warning. I will.Keep monitoring the water parameters... you've had an ammonia spike, nitrite spike is still coming up. Feed lightly, the "stomach" of those tetras is about the size of their eye.
Ps paradise fish are a subtropical fish