Friday, July 31, 2009
More Frys?
Thursday, July 9, 2009
Five at Four
Wednesday, July 1, 2009
Flash Frys
Little more than a blur

Sized up

Can you find the fish?

One fish - two fish

Whaaa? Itty Bitty Eye ;^)

Tuesday, June 23, 2009
GH + KH = TH - Hardness in ppm OR dH
Ode to a Chemist... and I can never remember which letters to cap and uncap!!!
Also, I can never remember which goes to what when it boils down to hardness of water. My water, out of the tap, typically, measures right around 100-120 ppm for TH (Total Hardness). (ppm = parts per million.) GH is the representation of CaCO3 (calcium carbonate). Some countries measure it as dH (degrees of hardness). Most of the measures in the US also measure KH (magnesium) along with GH for TH (Total Hardness). But, of course, most of the really fishly folks frown on combining the two... Here is more information about water hardness that actually made sense to me. Water Hardness
When I read articles that speak to one type of measurement while my measuring stick is marked in another, I start to see why even NASA scientists screw up when going back and forth between two forms of measurements.
So, for my own peace of mind, I will just come back here from now on to get my numbers semi straight for dH 2 ppm in relation to GH and let KH fall by the wayside for now.
ppm | GH | dH |
0 - 70 | very soft | 0 - 4 |
70 - 140 | soft | 4 - 8 |
140 - 210 | medium hard | 8 - 12 |
210 - 320 | hard | 12 - 18 |
320 - 530 | very hard | 18 - 30 |