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If you use dt's or phytofeast the nutients have been diluted down to the point of being immaterial. If you add your own home grown phyto you will be adding nutients to your tank. I add phytofeast to my tank for the copepods and feed my homegrown to the rotifer culture. I don't think you can grow much in the way of rotifers in your tank. There's just too many predators IMO.
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tank 125, 29 gal sump, 2 250w mh, 1 175w mh, 2 110w actinics, ev-180 skimmer, Dolphin 1200, Sequence Dart closed loop
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