Hi I am new here. I have been in this hobby off and on for 15 yrs. my main systems specs are as fallows. 120 gallon reef ready tank. 75 gallon sump. 25 gallon fuge . ASM G3 skimmer with all the mods. soon to be moving to an MRC2-R. I run 3 reactors. a ph monitor iwaki 70 rlt for a retun pump. 2...