I would agree, it is all about finding the right spot. I had Euphyllia that didn't grow at all in months, and as soon as I moved them, they exploded. One of the torches I had grew 6 or 7 heads in 6 months or so. It is all about getting the conditions of flow, light, water chemistry correct, and they will take off. My frogspawn was the slowest grower among all the Euphyllia I had (hammers, torches, and a frogspawn).