I recently was gone over the weekend and left my reef tank alone for two days. I had a cherub angel and two clowns. When I got back I found the cherub angel fish dead. Ammonia was at 0.25 and nitrates were at 30ppm. Nitrite was 0 and pH was 8.3.
I did a water change and ammonia dropped to 0 within 2 days. My clowns have these white spots on them. They weren't eating food when I fed them for 1-2 days and now have started eating again a little bit using Garlic Guard dipped mysis shrimp. I went ahead and bought a quarantine tank and copper medication.
Should I treat them or will they fight it off?
Mine is a 40 breeder mixed reef. Ammonia is 0, nitrates 0-5ppm so very low, nitrite is 0 and pH is 8.3. Salinity is 1.024 dKH
is 9. Just two clowns in the tank. Tank is established.