How quickly didn’t it go downhill? Torches can be finicky and melt for a number of reasons almost without obvious causes. Jelly? Any products used to drop phos too quickly may affect corals. Especially more sensitive ones like SPSs as I’ve done myself taking it too aggressively using plain GFO. Any AL leak likely will take time and usually not evident until much later. I didn’t see it immediately affect any of my coral just shows higher numbers in my ICP.I will not use Phosguard again - whether it was the aluminum it released or the quick drop in phosphates - one of those 2 killed my torches and hammers. Tank is restabilized now using Rowaphos - another thing I am seeing is that these products do drop alk as well.