I think I got a reading of 0.01 once on the 97g but otherwise my tests are always 0.00 and I am following the instructions to a t.
So what's the accepted excuse these days for zero readings and lots of algae? Since mine is only on my new rock I was guessing that the p04 is leached from those rocks and used 'on-site' before it can get into the water column. Don't even know if that's possible... I mean the rock has a billion nooks and crannies without algae so wouldn't it get into the water still? Also the stuff is growing on my powerheads even worse than the new rock.
0.00 <- Oh boy!
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