I dont agree with all the OTS, including the rock. When Dr. Shimek discussed this, I said when the day comes I have to throw out $10/lb. rock, I,m packing it in.
I have some rock thats 20yrs. with me alone. Some of its is in Mikes beautiful sps tank and see no problems from it. There,s many European tanks with rock older than many on here
I could certainly see OTS, {if there is such a thing}, coming from an older sandbed. Still think so many little things come in to play here and with many tanks suffering the same. I also think most are impossible to track down to one thing.
My 225, for those that can remember back then,
, could never grow sps but could grow coralline so thick it was in layers on the back. That ended up being a combination alkalinity problem, between Instant Ocean, {which I still use and swear by}, and my well water and the use of RO.
However, all that being said, I have been know to be wrong before.
My heart feels for Jason though and any others going through this. Its so sad to see.