AiptasiaX and Aiptasia Control are essentially the same as what do-it-yourselfers call "kalkwasser". You use a syring to inject it in them, or put it on their mouths and tentacles like I did. It's pretty effective, but a very large aiptasia came back after a few weeks, but I got him for good the second time. The aiptasia wouldn't cause all your fish to stress. I would do daily water changes for a while-10% or so. I used to get miffed when I got that recommendation from seasoned aquarists, but have found it usually will get the slimy guys through a rough patch. Like if you just added some new fishies and the bioload is taxing the biofilters ability to maintain proper balance.