Since April, my sister was looking after my fish until I got settled in my new home four hours away. Needless to say, the tank wasn't cleaned as often as it should have been. I moved everyone down here (who was left) with no difficulties & thought regular tank maitenence would take care of the couple of problem fish I saw. But I have had the tank home for 3 weeks now & the problems still persist. One black neon has dark patches near it's middle above & below & a couple of the other black neons have a tiny white spot on the lower tip of their lip, possibly fungus, but the spot is so small, it is hard to tell (definately not ick!) Now, a glowlight tetra has neon disease (it got all pale). Is there a safe bacterial treatment that I can dose the tank with to make sure there are no other problems?