I change Neptune's and Eponine's water on Sundays (both are in 10 gallons). Last weekend I was so busy I kept telling myself (I'll do it tomorrow), and before I knew it I had forgotten. Tonight, I looked into the tank and noticed Neptune acting strange. He was laying on his side at the bottom of the tank and swimming along the bottom on his side. I scooped him up in a plastic pint and he went back to his old self. It was then that I noticed he had a redish pink spot on his side. I was so frantic I quickly changed the water (90% change), before I had the chance to check the ammonia levels to see if that could be what caused his spot. The water smelled horrible (like rotten eggs). It was so bad my boyfriend left my house because the smell made him ill. I feel awful, and I can't believe how bad it got in two weeks. I couldn't smell anything until I started cleaning it (the water did not look murky, or dirty in appearance if you looked in). Anyway, I was wondering if that sounded like ammonia burns? Or if I should post in the diseases forum. I did recently add two snails to his tank from PetSmart. I work there, and I have not heard of anyone having any problems with the snails, or with disease from our tanks. At the same time, I guess the two snails could be the reason it got so bad so quickly.
He is back in his 10 g, and acting fine (and I could be imagining it, but it looks like his red spot is faded in the past hour). I fed him his dinner, and he ate like normal. Eponine is fine, and her water did not smell, nor did it come out more dirty than usual.
I feel horrible for Neptune, I feel like a horrible fish mom. I can't believe it got so bad so quickly. I can't believe I made him live in that awful water. With two snails in the tank is once a week okay? Or should I change it more?