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RE: LaMotte Test Kits
It sounds like you have the comparator. The slide system has
the reference in a bar that is moved until the color aligns with
the sample tube. I had one several years ago and preferred
it to the comparator.
The best way to get info on the kits is to go to the LaMotte web
site but the Nitrate kit Pet Warehouse sells isn't even listed on the
LaMotte site (or at least I couldn't find it).
Also the pH kit Pet Warehouse sells is not very useful. It has a
range of 5.0 - 8.5 in 0.5 increments but the color change in the
last half of the scale is not very clear. LaMotte sells a couple
of narrow range kits that would be more suitable for aquarium
use. The old Bromthymol blue mainstay has a pH range
of 6.0 - 7.4 in 0.2 increments and the have a Phenol red kit
that would be better for my use that has a range of 6.8 - 8.2 in 0.2 increments.
However these things cost over $25 each. It will be a VERY
long time before I buy another LaMotte kit considering the
quality has taken such a decline.
> This may be a stupid question but...
> What is the difference between the octa-slide and octet comparator? I have
> the LaMotte narrow range pH test kit. It came directly from LaMotte since I
> found no one else that carried it. It is in the older box you describe with
> a foam insert and a square black box of comparators where you slide the test
> tube into one of the holes in the box so you can read it. I assume this is
> the octet comparator. I am not familiar with the octa-slide, can you
> describe it? After looking at the Pet Warehouse website, it is difficult to
> tell anything about the kit.
> Daphne in Atlanta, where we don't even remember what rain looks like!