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  1. General Reef Discussion
    After reading the manual that comes with the Mag 12, it states that you should use a 1.5" (id) hose. I understand that a bigger (id) will give you more flow, but ... The return bulkhead is only a 3/4" . Won't the 3/4" bulkhead and pvc be the limiting factor? Am i ok to use the 3/4" tubing...
  2. Water movement (pumps & wavemakers)
    Anyone know how to tell the difference between the Mag 12A and 12B models? I bought the one I have used and after several months the ceramic impeller shaft has broken. To order a new one I need to figure out whether I have the A or B model. There aren't any markings on the outside or inside...