CleverBs
Aquarium Advice Addict
I just did a 10g water change on my 75g reef and all my corals have retracted their polyps and this has never happened before. What should I do? I tested the salinity and its still the same, 0 ammonia, 0 nitrites, <5 nitrates. I make saltwater the day before so it has a chance to properly mix. what should i test for? should I do another water change?