One of my big guys has been breathing heavy and keeps slimming.There is fish slime all over the place
.His breathing seems to be not as fast but i still see this gross slime coming off of him.there are 27 other polys in the tank with him and they all look great.Maybe old age?Maybe he ate a rock?Any ideas.The tank is 300 gallons and i do 50 percent water changes every three days because of all the polys and i have never had any problems?I feel so bad for him
.I added some salt did the normal water change and all i can think of now is




