The only issues I have with this are that such a treatment for
Anemonea cf. majano eliminates ALL of the invertebrates in the rock indiscriminately, AND that this treatment will most likely end up causing a huge ammonia spike (probably >16 PPM initially if the rock is in "normal" proportions to the amount of water) as the dead bioload begins to decompose. Although a large percentage of the creatures will leave the rock, it is just as likely that a number (probably 50:50 I would guess) will remain in the rock. I would definitely recommend a purge of the rock so treated with a FW soak by "cooking" it in the dark for at least a month or more until rinsing the rock with clean ASW demonstrates that the bacteria in the rock have stopped producing detrital mulm. This is to reduce the probability that the rock containing the biomass of the dead invertebrates does not import a ton of phosphate (and nitrogen) and initiate an algal bloom.
Then again, killing them IN the tank would definitely cause an ammonia issue with large populations of dead
majano, another reason to do only a percentage (say 60cc's worth of kalkpaste if so treating) of the
Anemonea at a single time, spacing out treatments by a few days.
JMO, HTH
