Moon's Graden

The test kit I have (Tetra Pond) uses dh (German degrees) instead of ppm.
It seems the vast majority of posters use the ppm standard, so my water
results always look out of kilter compared to those postings.

Also, many people seem to have highly accurate PH readings, like 8.3 . . .
these kits are color coded, and you take .5 jumps. My water is staying
between 8 and 8.5, but I just read that the scale is like the Richtor
scale - each point is 10 times worse than the previous point. So I can
understand that accuracy would be paramount. What test kit gives such a
precise reading?

TIA - Lee

I never figured out the dh to ppm myself.  As near as I can get it... its
something like 17.something so I just round up to 20.

I'd like to know what the exact number is too.

       })i({  Cindy  })i({

  If you think the grass is
 greener on the other side,
        get fertilizer!!!
              : )
    Live, Love, Laugh!!!

Don't lose sight of lifes simple treasures, they cost nothing yet are priceless

Hi ...  to convert dKH to ppm just multiply the dKH x 17.9.

On the chart it shows the # of drops ...  1 dKH  - then in the ppm column it
shows 17.9.  There are your values.

Nedra
www.geocities.com/Heartland/Pines/4836

: I never figured out the dh to ppm myself.  As near as I can get it... its
: something like 17.something so I just round up to 20.
:
: I'd like to know what the exact number is too.
:
:
:        })i({  Cindy  })i({
:
:   If you think the grass is
:  greener on the other side,
:         get fertilizer!!!
:               : )
:     Live, Love, Laugh!!!
:
: Don't lose sight of lifes simple treasures, they cost nothing yet are
priceless

Would that be the same conversion for GH?

Yes it would....

Nedra
www.geocities.com/Heartland/Pines/4836

: Would that be the same conversion for GH?
:
:

Thanks, Nedra. Now, do you have any idea which test kits (meters?) folks are
using that give them the integers in between .0 and .5 and then the next .0?
I.E., the .3's, .7's, etc.?  All this math is making my head hurt.  I'm
going to have to invest in a pondside calculator!

TIA, Lee

I use a Master Test Kit, by Aquarium Pharmaceuticals, Inc. Sold at Pet
Smart.  I suppose different companies make different kits.  More
important for a pH kit to be fresh, they don't last but a few months
and if yours is left from last year you probably need a new one.
There is a high and low range pH kit in the Master Test Kit and the
high range is graduated in .2 increments from 7.8 to 8.4 with a low of
7.4 and high of 8.8.  Your morning and night readings should be within
.4 of each other if the pH is stable in your pond.

One German Degree = 17.9 ppm
6 German Degree = 17.9 x 6 = 107.4

The test liquid measures in dh and there is a chart in the kit so you
don't have to do the multiplying, but it is the same thing and now you
can get your calculator and make your numbers like theirs, if you
want.

Regards,

Hal

1 degree = 17.8 mg/l CaCO3

You're allowed to visually interpolate within the pH color chart.
(p.s. up to 15% of men have varying degrees of blue/green
colorblindness, and most don't even know it, so this may be
a case in which your wife's opinion is more accurate!)