I have a 20 gallon live planted tank with 3 pregnant guppies, 3 baby guppies about a month old (I'm guessing) and about 15 fry (so far). I also have 2 small Nerite snails in the tank. I noticed today that one fish looks like she may have Ich. She has a few white dots that look like salt or sand stuck to her fins. I tried to get a decent pic. I've read several threads that say to raise the temp to 83F for about 2 weeks and that should kill off the parasites. I do regular water changes and all parameters look good. I also use Seachem Safe and Flourish Excel in the water and Matrix in the filter as well as floramax bio gravel. They get a variety of food choices including omega one color flakes and mini granules, veggie granules, red algae in a clip, ground krill fry starter, live mosquito larvae, blood worms and gnat larvae and BBS. the yellow tail is the one in question.