Hello everyone, I am building my second fish tank (160-gallon mbuna tank}. Filtration is underway, selecting substrate, decor, and background right now. My question is does crushed coral buffer ph to 8? For example, if my tap water is 7 and I add 10 lb of crushed coral it goes up how fast and to what? vs. If my tap ph is 8 and I add 10 lb of crushed coral does my ph even go up or does it stay around 8? How high can crushed coral raise ph? like to 8.4 or 9? Please help...