This is to all the cube boffs out there (somewhat lost in all this cube story, well not really) @irie ivan, @dallasg, @KillerWhale. I added my cubes to my system about 7 days ago; that I removed from my FOWLR system. My reef was already sitting at 4ppm NO3 and 0.08ppm PO4, today my readings have dropped to the above. Remember that I have been dosing with NO3PO4-X four about six months (I guess two forms of C dosing might work together, who knows what them bacteria are doing in there). So where too now, more cubes, gfh, titanium (when it comes out...)? What do the experts think. No intense brainarobix here, being doing ironing and that makes my arm muscle work harder which in turn makes my left hemisphere mush!