I would never use red slime remover. It is not worth the risk ever imo. Leave it alone and do a lot of water changes. In your mind, it makes more sense to try to remove it, but by doing this, you will just release the nutrients back into the water. Leave it alone and fix your water quality. That's the best way I've found to fix it. Cutting feedings would help too. Use red slime remover ONLY as a last resort.