I have a 6 to 7 inch gold saum with white stringy poop. It has been in a 90 gallon for a year with a jag oscar and jd. It is lowest on the pecking order. Currently it is in a 10 gallon hospital tank, two weeks now. I have PM most mods and people I feel know about this condition. I am treating it now with Api genera cure Metronidazole 250 mg Praziquantel 75mg according to package instructions. This is the second round of treatments with salt. I am also soaking its food in meds before feeding. It acts like it has a swim blatter problem, in the 90 he swims sideways and upside down, in the 10 he stays upright on the bottom. It has a hard time feeding on the surface and its stomach is starting to sink. Water conditions are ammonia 0.00 ppm nitrite 0.00 ppm nitrate 0~2 ppm looks closer to 0, ph is high 7.2~7.4 out of the tap, this is an api master water test kit. Water changes are 40 gallons weekly, filtration is ehime 2128 pro 2 and 9 watt u.v. sterilizer. Food is hikari cichlid gold, hikari krill, blood worms & super mill worms, last three are treat about once a week. I quit posting almost a year ago because of conflicts lack of responces and rude pm's. My fish needs help so if you have any idea to cure this we could use the help.