What’s your parameters? Do they have velvet or why do they need meds? Breathing heavy could be from heat, lack of oxygen, salinity wrong, ammonia, nitrite, lots of things.
Also another thing that has been curious about is the ammonia. It stays about <0.15 for awhile now. I’ve done multiple water changes and I’ve test my ammonia Salifert kit on ro/di water and comes up 0 so I know it’s not the kit. What could I do to get this down. I’ve slowed down feeding to a minimum for about a month now