ive had the it tank running for about 2-3 months and the comets were my first fish what type, i have no idea, all i know is that ive got two of the normal types of goldfish (Comet) and one of the ones which doesnt have a dorsal fin something beginning with a C (sorry i cant be more helpful ) and ive got two plecs i have no idea about the nitrogen so anything u can tell me would be great I dont know what it was, we never found out, it had a clearish white body with a green edge around it, and we did buy some Stress Coat which we were told it would help but reading it now it doesnt say anything about treating the water for stuff like that. What should i do for now,ive got the two comets quaratine at the moment should i keep them in there or put the other three fish in new water? Should i fully clean thm out? Do i need to buy anything for the water and if i do, what?
i think my fish have Septicemia due to the fact that
the viens in their tail has become bloodshot I recenty lost a a fish as it had a parasite on its tail and when we got it go it got a rip in in and the veins went blood shot as well and then he wasnt moving much expect when he was fed but when he swam up he was sinking as if he was weighted down They all have what looks like white poo but the coments only has small bits when my other, larger fish had a quite large string of it and the bit near its bum it is red/orangie. but they dont have any small haemorrhages around eyes, loss of appetite, sluggish or very sluggish behavior
so i dont know please please help as i dont know what to do