I recently found a guppy with what looked like Ich on her fins. It was only a few spots and I had just moved her to a 20 gallon mother/fry tank. I slowly raised the temp and it's been hanging around 85.something ... i guess I'll bump it up a tad. It seemed like the spots were gone rather quickly on her. No other fish have been affected. I've been feeding garlic juiced food and squirting a bit in the tank as well as putting a slice or two of garlic clove into the tank every couple days. After I found the guppy I found a couple fish in my 38 gallon with a couple spots. I raised the temp the same day as the other tank. Same deal with the garlic. The spots are still there ... one is a glo white skirt tetra and the other is a Dalmatian platy. I'm not sure what to do. I've done gravel vacs and water changes but the spots remain. I've also added a sponge filter to help with bubbling and extra filtration since the 38 gal only has a 200 gph filter. Thoughts?