I hear ya. I don't like messing with rocks either. Just my exp this weekend...while I don't have any detectable nitrates on an API test, I had one spot of gha that was not being eaten by my cuc, prob because it was too long. During a 30g waterchange i said eff it, and I removed one rock at a time and did what i explained to you, put the rock in the drained water barrel and remove the gha by hand/tweezers. Not fun. After I got the rock back in place and filled the tank back up, which took almost 2 hours, my fish were no worse for wear or stressed, they ate and went about their business. My mystery wrasse cruised thru all the new holes and such looking for pods or whatever he eats. You need to do what your comfortable with as you know tour tank inhabitants best. I've noticed over the time my 90 has been running with fish that when they were first in the tank, all my fish were easily spooked whenever I did stuff in/with the tank. Now they go about their business. They run and hide in the beginning, but then come out and confirms thing while I clean away. Also, I only altered a few rocks one one of my 2 rock islands, from what I gather your tank is more of a wall scape and would probably be a full tank re-do. It's a tough choice, good luck and keep everyone posted