I'm needing to regain control after attempting to get rid of some algae via Fluconazole. I carbon dose (vinegar) and Nitrates were at 20 following 2 doses when I did a 20 gallon change on my 75g DT + 20g sump on Thursday. My phosphates are still <0.03, Nitrates 10, and (I think herein lies the issue) Alk is at 9.6. Usually my tank runs ULNS and alk around 7.9, but I bumped it up to account for higher nutrients. I'm still having some tissue loss on corals... should I bump it up higher? Raise my vinegar amount until Nitrates drop off?


