newbie help

I have 2 fishes. One is completely fine. The other one is not. The one who isn't looks like he's full of air. He's not looking like a balloon or anything, he looks normal-ish, but turns around as if he had air in his stomach, and that "pulled" him up. He swims weird, on the side (happened...

Morning all, - I have been away from fish keeping for a few years an recently got myself a fluval Roma 200, I have started the cycle with Dr timms Ammonia ( @ 4 drops per US gallon this being approx 169 drops), i have tested for the last 2 days and ammonia is static at 5ppm according to the NT...