Hi all I've been considering a calcium reactor for my 425xl. I do not have room in the sump or cabinet for all the gear so I need to ask if what I am thinking is possible or a very bad idea. The tank is currently run by a Cor-20 with a manifold of 1 inch PVC. I have a couple reactors for carbon hooked up and get flows in the 400-500 range. Directly below the tank through the floor into my basement, I have my water station and DOS for AWC. I am wondering if it is possible to setup a calcium reactor down there roughly 6-8 feet below the sump. It would be fed off of the manifold up in the sump. Is this a bad idea? Will the added head pressure prevent the effluent from getting back to the tank? Will this added head pressure affect the reaction chamber in a deleterious way? Appreciate any help or insights and if possible and recommendations for the reactor. Ive been looking at the Vertex and Geo's. Thanks!