Would the water's ambient salt level make any difference? IOW, if the
ambient level is .02, it would need to be subtracted from the .11, leaving
..09. Therefore, 13-9 = 4/13 = ~31. A 31% water change would have been
closer to what you "thought" it was, instead of 15%. Or am I full of "it"
again? Math was never my forte. I don't know if it would make a difference
or not.

Lee

"~ jan JJsPond.us" wrote in message
s.com...
Glad you liked it. I do wonder how many folks this went "Zoom" over their
heads or felt like, Ponds, Math, Huh? ;o) VBEG ~ jan

jan, the "divided by 13" comes from your beginning figure of .13? Kewl!

Lee

"~ jan JJsPond.us" wrote in message
ws.com...
I did a water change today and thought I'd do a salt check before and
after. Before the change I had a salt level of .13%, after I had .11%.
Bascially doing a little more than a 15% water change out. (13 - 11 =
2, 2
divided by 13 equals .154 or 15.4%) Surprised me. Here I though I was
doing
between 20-25%.

So for those of us who don't have perfectly straight walled, flat
bottom
ponds who could calculate their water change % in feet (or inches)
i.e., 4
ft of pond, drain down 1' equals a 25% change out. Here is another way
to
use your salt test measurements. ;o) ~ jan
(Do you know where your water quality is?)


(Do you know where your water quality is?)