You put the mushrooms in freshwater for two weeks and they didn't die? I find that difficult to believe. Normally they would have died very quickly if left in freshwater.
Joe's Juice is a type of kalkwasser. I don't believe that there is much difference between Joe's Juice and AiptasiaX. I am kind of the opposite of Mr_X as I have only used Joe's Juice but have never used AiptasiaX. I can attest that Joe's Juice will take down anything that it is put on: aiptasia, majano, colonial hydroix, pulsating xenia (if it's large you will need multiple applications)