I’m gonna say what ever made the mushies bounce is what’s going on with these acros… I’m 100% convinced it’s the same thing! The bad part is acros stall out and don’t really grow once they bounce thou which sucks… I’ve noticed they do continue to encrust and new growth doesn’t have it but any body of a acro with bubbles just stalls out… rrrr.. I still haven’t lost any pieces from it, and torts seem to be the only infected pieces besides a pc rainbow and my pink lemonade that recovered from it… go figure lol.. all my other acros are fine and growing well! Tenius, stylos, slimers birds nest etc.