I'm going to have to disagree with you here on this. I know exactly what aiptasia is, and I have not had any in my 3 years established 120g. I don't keep any aiptasia-feeding predators. I used TBS rock, never added any other live rock from another source, and made sure I removed every plug as I added corals over the years. That probably helped.I tend to think that there are two kinds of reefers. Those who have aiptasia and know it; those who have aiptasia and don't know it. I'm sure there are small or new tanks that don't have them, but I think the vast majority of larger or established tanks do. Remove your predators and you'll find out LOL.
Does that work? I have had a lot.of success with the aiptasiaXMy nano gets 1-2 a month. Obvs there’s more where I can’t see them — they’re coming from somewhere. If they pop up on the sandbed I just scoop them out with a spoon. The ones on the rock get a nice smothering of super glue.