- What do you feed them? I switched my fish-o's to some new food and the two red and black fish I have are turning mostly red. diet definitely can help encourage a color change.
- Marineland goldfish food
- Can you grab a picture of the zit-looking thing on your fish? Could be early stage ick, could be a parasite of some kind, could be a fin break. Photos will make diagnosis much easier.
- following some answers...