Hi, my platy seems to have a white gel-like mass (not red or inflammed) sticking out of its anus. Other tank mates include two small juvenile angelfish. I had been treating the tank once a week for the past two weeks with prazipro, as the angelfish were not eating. Now they are eating. The other day after doing a water change I noticed a couple small (barely wiggling) nematodes in the water column. I'm not sure if they are parasitic or not, or if they are camallanus. Fortunately I have some levamisole on hand and dosed the tank last night after I had done 3 25% water changes (with vacuum gravel) during the day. Any thoughts on anything else I could do? The platy ate yesterday morning, but not last night or this morning. The last time (also the first time) I used levamisole my fish didn't eat for a day.