Hi
I used to use Red Sea blue bucket and the tank was always great. After watching the BRSTV episodes on salt, I switched to Tropic Marine Pro reef, coincidently, this was around the time the tank started declining.
I chose Tropic Marine Pro Reef as it is regarded as the best salt by many users.
I have performed many water changes over recent months and I am now on my third 25kg bucket, all bought at different times from different suppliers.
I also performed an ICP test on the fresh salt from the first bucket and it didn’t show any of the elevated elements that was evident in my aquarium. Also a few months back, I did 2 huge 75% water changes on consecutive weekends, after this, the tank started showing some positive improvements. A plating monti started growing again and put on a centimetre of growth, and a dead acropora skeleton that hadn’t been removed started to grow some new tissue. This lasted 2-3 weeks and then everything in the tank started declining fast again, the few SPS that had survived died from RTN over a couple of days and a frogspawn LPS ejected all of its heads.
I am more than happy to take your advice and change to a different salt brand but do you still think it could be the cause.
I thinks personally it’s worth a try, I was about ready to give up on my tank and that was the problem in my case. Might be different in your case but another factor to look at.