I just bought the Hanna LR meter because I was skeptical about the readings from the color based tests. My Merck and Salifert test were reading in the range of 0.015-0.03 but I was still having problems with hair algae and some cyano. My RO/DI water reads 0 with the Hanna meter. However, water from my tank and the phosban reactors (250 ml Rowaphos and 300 ml PhosGuard) ranges from 0.03-0.05. I'm not sure what to make of all this.
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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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