It just erupted overnight, not long after setting up the Rccia aquascape. A three day black out got rid of it like a dream, but it seems to be on its way back again, and is appearing in my two other tanks that have probably been cross infected.
I know why it appeared the first time, but I am at a loss as to why it is coming back. I tried spot treating it with Excel on a rock on my Iwagumi, but it is looking pretty bomb proof. Normally, I have a lot of success with Excel, but not in this case.
Dave.