Someone I know has a "Grow a Frog" kit. I tested the ammonia level of the tank because the tadpole would just float, and float, and the water smelled like garbage. The ammonia was at 8.0ppm. I did a 50% water change and it came down to 4.0ppm. Last night it started coughing out this blue fuzzy stuff, now its coming out of its gills too. I changed the rest of the water this morning, 100% and cleaned all the rotten gunk out of the sand.

Its got blue fuzz coming out of its gills and I can see its belly is bloated with gas and with the blue gunk. The sand that came with the kit is blue, and i assumed its just coloring leeching into the water, but the fuzzy junk is really worrying me. I cant find an answer anywhere. Please help so I can save it before its too late.