Frogspawn problems

[t1a1c1h]

We have had a 4 headed branching frogspawn in our tank for a couple of months now. When we first added it it was fully extended and seemed really happy. However after a couple of weeks the upper 2 heads are always partially withdrawn. We've tried everything we can think of to solve this - moved to higher flow, to lower flow, higher light, lower light, dipped in coral revive.... It takes its food and is actively growing another head (VERY small at the moment but growing!). None of the fish bother it. Tank parameters are all fine and stable including alk which I've read they are sensitive to. Anybody got any ideas? Clutching at straws here!

 

[linkedsilas]

By far this is the testiest coral I own. When I moved it, it was ****ed at me for a very long time.

 

[uncleL]

I add Kalk, Strontium & Molybdenum + Iodine to my ATO once I got a Frogspawn and Hammer LFS Trick for simple dosing. I have them in the middle of the tank under LEDS with moderate flow and light.