I am still fairly newer to fish keeping. I have a 10 gallon tank with a betta, 6 neon tetras, 2 mystery snails, cherry shrimp with majority of them being 2-3 weeks old whereas I had 3 pregnant shrimp recently gave birth ;). One neon has this white stuff on his mouth and I cannot figure out what it is. It's been there weeks if not months. I heard columarias kills fish rapidly which makes me believe that's not it. I have one other neon with just a pen size white dot on his "chin". No issues with others. I bought the Maracyn from here and wondering if it's ok to dose the tank with all the shrimplets and plants. It says it's snail and shrimp safe but also directions and reading up on things recommend a hospital tank. What would you suggest?? Thank you!
PH - about 7.5
Ammonia- 0ppm
Nitrite - 0ppm
Nitrates - between 10-20 after a recent water change and rinsing the sponge filter well (using tank water)
