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Folk, Sorry if this has been covered 100 times before, but after searcing I could not find it. I am now getting into the hard corals and I am kind of new to it. What is the difference between a Kalkwasser Reactor and a Kalkwasser Doser?

Currently I have a 110g set up the tank is 27” high and has a custom hood which as 8.5” of clearance above the water. I am running 2x96w CFs - obviously not enough lighting. I was leaning towards keeping the 2x96w CFs and adding 2x250w HQI Metal Halide bulbs (692w total) but due to the heat, I...