Remember I was just giving a rough example of how the reaction works, not recommending any certain amount or method of introduction. The key is finding the right balance between your quantity of water & amount of buffer (coral) to get the pH you want in your tank. Its about equilibrium between the 2. If you have driftwood (especially Mopani), you will need to add extra buffers due to the wood's natural absorption of particles. I also used the "one piece at a time" method, since I didnt know how much KH my Mopani would suck out. I bought a bag of fossil coral chunks from the LFS (not fresh dead coral from the saltwater shop) & put in 3 pieces the first night. By the next morning, my pH had come up from 6.2 to 7.0. This was quicker than I wanted, but I still needed higher pH, so I added one more piece each day until I got to 8.2 (took 3 or 4 days & 7 hunks of coral). This has kept my tank ultra stable ever since. My tap is 7.4, so the tank only swings maybe .2 or .4 during a WC & bounces back up to 8.2 in about 4 hours. I have Mollies & Puffers in that tank & they show absolutely no signs of stress. I cant prevent the pH swing, so I just try to keep the swing time as short as possible.
