I have used matted and green filefish, Klein's butterflies, copperbands and peppermint shrimp. The bottom line in my tanks is that these will get rid of aiptasia where they can be reached. The filefish and Klein's butterflies did a great job of eliminating the aiptasia on exposed surfaces. Once I got copperbands to survive in my tanks (mostly by following Paul B's recommendation of not quarantining them) they did a great job of getting rid of aiptasia that had their bases deep in rock crevices. My frag tank is 100% aiptasia free, enforced by a small copperband. Peppermint shrimp, even MANY of them did not do much in my tanks. Now I have wrasses so no more shrimp.
However, I can see good-sized aiptasia growing between rocks that are inaccessible to the fish. Perhaps berghia would get rid of these if I had some.
Since you only have 1 visible aiptasia, I'd take that rock out of the tank and torch the aiptasia. Torch cigar lighters work great for this and it is very satisfying to see them sizzle and explode - at least for me. Keep burning them long after you think it the aiptasia is gone.
Lastly, I have a Klein's butterfly in my 150g and my 75g. The one in the 150g is a serious coral muncher. I have seen it eating fleshy corals such as acans, lobos and scolys so those are now in my frag tank. The one in my 75g is well-behaved. The copperbands don't bother anything in my 150g or my frag tank, even the fleshy LPS I took out of the 150g. Those are growing very nicely in the frag tank now. One of these days, I need to get rid of that Klein's and its partner in LPS eating - a flame angel.
However, I can see good-sized aiptasia growing between rocks that are inaccessible to the fish. Perhaps berghia would get rid of these if I had some.
Since you only have 1 visible aiptasia, I'd take that rock out of the tank and torch the aiptasia. Torch cigar lighters work great for this and it is very satisfying to see them sizzle and explode - at least for me. Keep burning them long after you think it the aiptasia is gone.
Lastly, I have a Klein's butterfly in my 150g and my 75g. The one in the 150g is a serious coral muncher. I have seen it eating fleshy corals such as acans, lobos and scolys so those are now in my frag tank. The one in my 75g is well-behaved. The copperbands don't bother anything in my 150g or my frag tank, even the fleshy LPS I took out of the 150g. Those are growing very nicely in the frag tank now. One of these days, I need to get rid of that Klein's and its partner in LPS eating - a flame angel.