I added 30lbs of base rock to a 65g and I didn't see any changes with my testable parameters. However, I did get some crazy hair algae growth on the rocks that lasted a month and a half. And this was after soaking the rocks in saltwater for two weeks with a remora skimmer and doing two 100% water changes.
I did not have good luck with Marine Epoxy, but some others have.
It doesn't work like glue. It is more like a plastic that you have to mold around the little crevasses in the rock. When it hardens, it's like a plastic link between two rocks that holds them together.