I have used both. I used polyplab for 5-6 months and saw some growth in my SPS with no effects when I stopped (but did not stop cold turkey). I have been using zeo for >1 month and think the growth is probably better. My tank parameters have deteriorated when starting the zeo. My PO4 went from 0.01 to 0.10 with some hair algae growth. However, the PO4 is improving. I would go with zeo, although obtaining a reactor is a pain.
p.s. it is difficult to keep the reactor full of water when it is turned off. You are supposed to turn it on and off every three hours initially while your nutrients are high. This usually involves some form of modification.
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300 gal starphire custom built in pentagon reef (+90 gal sump on Blue Line 100 HD return pump, 210lb LR, Euro-Reef RC250 skimmer, 2x400W MH, 2x28W compacts, 2xTurbelle classic 4002 pumps & Turbelle Stream 6100 on 7095 Multicontroller, running ZEOvit)
Livestock
Fish: damsels; sailfin, yellow, regal & naso tangs; ocellaris & tomato clowns; lyretail anthias; foxface lo; flame angelfish
corals: a few
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