Perhaps the spores were already in the water column before using ApX?
I have never witnessed any such thing by employing it. If you stay on them you will keep them at bay..
It's a never ending battle with products like Aiptasia X. It'll work ok for the occasional one or two on a frag plug. But not an all out infestation like I've dealt with in the past. Need aggressive predation on top of products like this to really control an outbreak.


