Small discus and one dark one

[ladyram]

5 months ago I bought 4 ocean greens but they haven't grown at all, all are 2" now they are having white stringy poo.

I have another one that looks fine but is very dark and doesn't eat too much, I am suspecting worms ¿¿what do you think?? ¿¿how do I treat them??

[Carol_Roberts]

I think intestinal flagellates and metronidazole.

Are you sure you want to waste any more time on these guys? If they are 2 inches after 5 months I don't think your going to get much growth. I'd euthanize these guys, clean the tank, do a fishless cycle and start over.