I've started this thread to carry on from one started in Buy Sell and Swap as this is probably the better place for it. This is the thread -
http/www.fishforums.net/index.php?showtopic=277436
So what I'd like to know is which units API use in their GH test kit. My water board has a table for the hardness in all it's areas and it says mine is 7 degrees clarke, 5 degrees german and 8 degrees french. Which one does API use? This is why I use ppm, to avoid confusion.
Last time I tested my water a few months ago (bottle expired and I've not replaced it yet) it took between 7 and 8 drops - it was always hard to decide when I'd actually reached the end point. That would fit in with clarke and french, but I'm sure I read that german is the usual one.
The thing is, as someone with a degree in chemistry, albeit from the mid 70s, I don't like all these different measurements. Surely ppm is better as there's only one way to quote that!
http/www.fishforums.net/index.php?showtopic=277436
So what I'd like to know is which units API use in their GH test kit. My water board has a table for the hardness in all it's areas and it says mine is 7 degrees clarke, 5 degrees german and 8 degrees french. Which one does API use? This is why I use ppm, to avoid confusion.
Last time I tested my water a few months ago (bottle expired and I've not replaced it yet) it took between 7 and 8 drops - it was always hard to decide when I'd actually reached the end point. That would fit in with clarke and french, but I'm sure I read that german is the usual one.
The thing is, as someone with a degree in chemistry, albeit from the mid 70s, I don't like all these different measurements. Surely ppm is better as there's only one way to quote that!