Parameters are nothing exceptional...nowadays ~77F, Ca 415-430ppm, 7-9dKH, Mg 1280, monthly ~15% water changes. Geo 624 Ca Rx w/ Tropic Eden media and NeoMag, AquaC EV-180 on about 300g total system. Don't test for phosphates, nitrates, etc. No pellets, resins, carbons, or additives. DIY Cree LEDs over everything that have been running for 4-6 years depending on the fixture. NLS pellets and formula 2 flake in auto feeders, plus daily feedings with DIY blender food.
Honestly that coral survived a major system issue for close to a year that killed off 80% of my other Acropora. It quit growing and had a little base recession, but was otherwise unaffected. First and foremost was a bad expired Ca test kit that was reading 360-380ppm, when it was actually over 550ppm. As a result I was constantly fiddling with my Ca Rx, dosing Ca and Alk and finally said screw it and nearly tore down the system. I suspect I had other issues from well water and a move, plus neglect due to more complicating factors life threw at me at the time.
I do not slight purplereef at all for the size of the frag...at the time it was a VERY hard to come by coral and for the price it was generously sized for a frag with lineage
This was also before the Aussie imports were common and a true echinata was a very scarce coral.
Logzor...I am really surprised at the growth form of yours. Everyone I have known with the original Aquascene Icefire gets tight bushy growth, I have only gotten mine to branch out a bit with very low non-turbulent flow. I have another smaller colony with less flow that is stretching a little more. Are you sure of the lineage on yours, and if so, what kind of flow does yours receive? Mine came from a T5 tank that also had bushy growth.
Here's another view from the same date: