medication

One guppy has a streak of blood in his tail, three large slashes and discoloured (almost white) patches on his tail. The other guppy has a very ragged tail and is losing sections of it fast. I vacuumed the gravel as I always do when I clean the tank and did a large water change. I don't know...

Hey guys, I need some help. My molly fish has weird green stuff growing on its fins. I noticed this when my Molly fish went really close to the lights at the top of the tank, and when the lights shone through her fins it exposed this weird green stuff on her fins. What is this stuff? Is it...