This is using one of my favorite Apophysis gradients, 036_solid-sky. You can get the Apo palettes that have been converted to FE here [link]
. (by *Pharmagician
Made with Fractal Explorer
Edit: I rendered this over with a higher iterations setting and it looks much better. I get ahead of myself sometimes and as I learn this program, I obviously learn how to make improvements. So this is much better than the original.