hah, i do rinse it every day with the good ol arizona tap water...im thinking little bubbles sometimes get on the thing and it makes it way off...i tap it but sometimes the bubbles dont all float..grr
I get rock tomorrow..so we will see what it reads then.
46G Bowfront tank, 46# WaltSmith Fiji LR
, 30# Sand, AquaClear 70 filter, Standard Heater, Penguin 1140 PowerHead. 2 spotted puffer fish, 2 Ocellaris Clown
4 Green Chromis, 1 Hermit Crab, 1 turbo snail, couple asst snails, 4 small hermit crabs