I am planning on getting a reef keeper controller. I want to incorporate kalk to my system using a doser running from readings on my ph probe. Is that possible? I don't run a sump because I don't have the room for one. I don't have an ATO, do that manually. My tank is 55 gal. With a canister filter that works great for me. Thanks everyone! Reefing is like a box of chocolates, you never know whatcha gonna get!