I've seen test kits that were so far out of whack it's spooky. A buddy of mine who lives just down the street gave me some fish one day, he phoned me to ask me if I wanted them so I said sure. I asked what his pH and GH were, set the water and went and got the fish, when I got them home on a whim I tested his water, he said his water was 7.5pH my test kit showed his water well below 6. I ran down the the LFS and got another test kit and the new one pretty much matched his, but not exactly, I'd still say with in .5pH. Did mine expire or was it just faulty, I don't know but I do know that even two brand new kits can give you varying readings. It would sure be nice to have the $$ to go completly digital wouldn't it.
Doug
|