Please keep this thread up to date, and if they return, update it.....I have 1 of 3 mains that does have it in there - though only the occasional aiptasia will I see and kill with injection of kalkwasser......
Sadly this tank was horribly infested a few years ago and I totally broke it down/boiled live rock & substrate - the works, and it was free till one day a year later I returned a rock with large polyp buttons on it - that likely had one on it, cause I saw the 1st one 2weeks later in that tank....
I have purchased and introduced to the affected tank (last month) 4 peppermint shrimps from swf.com - and assume/hope they are the aiptasia eating variety (Lysmata wurdemanni) - cause there is a very similar/almost identical looking commonly called Peppermint shrimp (california cleaner) which is Lysmata californica. .The 2 are very similar looking, and when are young are very difficult to disninguish. The latter one will NOT eat aiptasia. I'll know more as they grow, in a couple months I'll be better able to 100% identify - they're still 1" long. (and both varieties stay hidden during daylight cycle)
Glad you found a solution! !