Okey dokey, so I had four guppies and three platys in a twenty gallon tank. I’d had the guppies for almost a month, and suddenly they all got sick at the same and three of the four died within two days. That was two days ago, and the one is still holding on, I don’t think he ever had it as bad as the others, but I want to keep him alive. I am going to add some aquarium salt to try and help (I think they have fin rot, and the platys are all fine. I don’t want to add medication to the tank), but I don’t know how much I should add. Does the power of the filtration matter, because it’s a pretty powerful filter compared to the size of the tank (the filter would work for a 20-50 gallon tank, and, as stated earlier, it’s just a twenty gallon).
Next tank, a five gallon, heated and filtered, tank with a male halfmoon betta in it. He bit off an entire (very large) section of his tail a week ago, and it’s slowly starting to grow back, but I think he may have been stressed out and the aquarium salt would not only help regrowth and prevent fin rot but it would also keep his stress levels down. How much for that one? Once again, the filter is for 5-10 gallons, so (since it’s only a five gallon) I guess the filter is moderately powerful for the tank.