I have similar issues when I had high phos from a dino battle and brought it back down too quickly with rowaphos. I took out the rowaphos and let everything stabilize. 37 ppb (which I read is 0.11ppm) isn't THAT high for acros. I run a tank with 8dkh and my acros will suffer tip burn at any phos lower than 0.03. I agree with above that removing rowaphos is probably a good start. Whenever I have those damaged tips, I clip the damaged areas after everything stabilizes and the tissue usually grows back over the clipped areas.
I've had P04 as high as .77 and the tank looked fine, including acros.. but I panicked and reduced P04 with GFO too quickly and almost nuked my tank. I've learned to stop messing with things when the tank looks fine.. Good advice here...