# [Killietalk] scales and fold, times, pH scales

```The difference between 5 fold and 5 times.

5 fold ... take a piece of paper and fold it in half 5 times if the area is
now 2 inches squared, the original paper area was 64 inches squared

5 times ... if the area of an object is 2 inches, lay down 4 more piece the
same size (so that there are a total of 5 there) .... the area is now 10
square inches

compare:
5 fold of 2 goes to 64
5 times of 2 goes to 10

Now what about a change of 5 units on the pH scale:
That is 10 to the 5th times (larger or smaller)  100,000 more (or less if a
drop) of acidic substance (free ions???) in the water.

Just doing some math.
Richard Brice
----- Original Message -----
From: "wm crash" <wm_crash at hotmail_com>
To: "killifish discussion list" <killietalk at aka_org>
Sent: Friday, February 29, 2008 1:54 PM
Subject: Re: [Killietalk] having to do with de-chlorinators

Howdy,

I have an issue with the "recommended dose" concept. We all have different
concentration of [chlorine, chloramine, heavy metals, etc] in our water. It
is my best guess that these water additives will cover the worst case
scenario for water available to people. Also, any
dechlorinator/dechloraminator/metal chelator/etc that does not react/bind to
anything is not detrimental to aquatic life.

Take for example my tap water chloramine concentration: it is at the low end
of the recommended concentration. From memory (and don't quote me on that)
the difference between the low end and high end for chloramine concentration
is about five fold. What do I do now? Water down the dechloramination?

Again, I think these basic additives are "one size fits most" (if not "one
size fits all").

I have enough fish to throw at an experiment on the fatality of commercial
dechlorinators. I am taking suggestions. I am thinking 4 products, 5
different concentrations each, 5 fish per container . . . that's 100 fish
there.
cheers
wm_crash, the friendly hooligan

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