Picked up some 1/4” acrylic rod as a supplement to two buckets of emarco I have to secure the rock in my tank. Plan was to remove about 1/3 of the rock at a time, emarco the rock after any chiseling I want to do, zip tie it, then drill and insert rods. I read about using cement to secure it as well, unsure if that would cause a ph spike or if it is even necessary. Any thoughts?