Hi there - I have a ~140 G marine tank with sump. It's filled with Tunze products: 1x7240, 1x6025, 1x6055, 1x7095, Wavebox, DOC Skimmer and Oslomator. The only not-tunze product is the sump return pump (which is 2500l/h) and the MH lights. My goal is to work towards having a beautiful reef tank with healthy growing stony corals. Happy to invest more money - in steps - to buy further Tunze equipment to reach my beautiful coral reef target. What would be the next natural step in terms of equipment? Should I continue to focus on further increasing water movement (not sure I still have optimal water movement with existing equipment?), or start thinking of a calcium reactor or? What advise do you have for me?