I didn't take your comments as harsh. I have never used copper to solve an aiptasia problem, nor would I. I use aiptasia in refugia as a means of mechanical filtration and nutrient assimilation and export. Physical barrier and UV irradiation assures that they don't infest the display tank.
When I experience aiptasia infestations, I've always had success with fish or shrimp as a biological control. As stated in earlier posts, mechanical removal is often one step forward, two steps back, as they are cued to reproduce. My recommendation of copper as a "cure", was only implied as the lesser of the available evils (chemical warfare).
Just to clarify, Kalkwasser, Joe's Juice, and calcium hydroxide are all one in the same chemical. They are only marginally effective when used correctly.
Once one has exhausted their patience with the injection method and biological cures, chemical warfare is regrettably the final option. If you are in that place, you must weigh the various weapons at hand.
Calcium hydroxide would kill everything in its' wake if added to the tank at a lethal dose for aiptasia. The PH would shoot up to 11 and alter water chemistry.
Medications such as formalin, methylene blue, malachite green, acriflavine, and to round out the colour spectrum, potassium permanganate, will all adversely effect nitrifying bacteria.
On the other hand, copper sulphate will target any and all invertebrates while leaving nitrifying bacteria intact. There are no dyes to contend with and polymeric absorbents and/or ion exchange resins will remove all residual Cu even if bound in calcareous media. Coraline algae will be lost to some degree, but it will bounce back.
One mans heavy metal is another mans trace element. Fish have haemoglobin in their blood which is comprised of iron. Marine invertebrates on the other hand, have haemocyanin in their blood which is comprised of copper. This is how copper medications are able to kill invertebrates while remaining "safe" for vertebrates, algae, and bacteria.
The idea that an aquarium that once contained copper not being reef safe is false. Once copper falls out of solution, it's no longer a threat to invertebrates. Although copper is bound in calcareous media, it can be removed chemically as stated above.
Have you tried copperband or longnose (f. logirostris) butterflies with your majano? Overfeeding is often the cause of their rise, but limiting food seldom brings their fall.