black neon tetra

I've known for a while that I wanted cardinal tetra in my 29 gallon softwater community. I'm just waiting to get the plants in and the tank to mature again (removed the substrate). The substrate fish have also been decided on for a while. I love kuhli loach. I also know I want a gourami in there...

5 gallon tank Elite filter up to 10gallons small heater temp 25.6 ph 6.8 ammonia 0.3 black neon, has been missing half his face since I got him (3 weeks to1 month ago). eye appears shrunken in the skull, possibly gone altogether. gill was already partially diminished, appears worse now. eye...

Hi everyone, I am new to the forum so if I miss anything I'm sorry and will answer any questions to the best of my ability. I'm a n00b at fish keeping, so I am just starting to learn a lot. I have a 5 gallon tank, almost a month old. water paramaters tested every few days, all is well. I did...