Charlie, a pool store will try to do things his own way and not mine. So I have to have a good sensible loving TFPer, one to whom I can tell all my most precious Chem testing secrets-while I am still alive....
OK.. all in one post.. all my chem testing tid-bits... First here is the TF100 reference card I made.. yes I use it, I made it. Is this blatant self promotion?, heck yeah.

If anything I no longer glance at the other instructions and "fill the 25 ml vial" to 25 ml, when I am supposed to be filling to 10ml.
Here's a link to the thread with the PDF version of it for you:
Any chance you’d be willing to sell me a laminated copy of yours? Mine got wet and smeared pretty quickly since I don’t have a laminator. The quick reference card has been SO USEFUL for newbies like me to glance and go
www.troublefreepool.com
For years I tried different water sampling methods.. I got tired of sticking my arm in up to the pit or cogitating making some variation of a
Nansen bottle. So this is how I suck up my water sample..
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Its just a cheap 2 foot water squirter from the dollar store, with one minor mod. I cut the tip down so the hole is bigger and the water flows out on its own. I can suck it up like a syringe from the briny depths and then let it drain into whatever test vial(s) or sample bottle I want. There is more than enough in the tube to do a rinse and a fill. The only downside is it doesn't fit in my test kit box. Can you say one buck!
In this pic are my other test kit tweaks:
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-Many of the caps for the TF100 reagent bottles I got were white. And since I preferred a case where the bottles stand up, I couldn't really see the label very well. So I added a colored dot with a Sharpie to the top of the bottle to indicate their test. It matches my Reference card too.
-I rubber band the reagent bottles together by their test.. that way If I am running just one test I grab just that bundle of bottles. If I run more than one test I usually grab the whole case. I found it more convenient than each bottle in its own foam hole or little divider. At least until I change my mind and do it another way.
-The cap to the little comparator always gets lost. I will set it aside to let things dry before I put it away and then I can't find it. Once I found it in the skimmer basket. So I used some clear packing tape to make a little pocket for the cap in the hollow of the comparator.
-Yes, the case is from dollar store too... that was another buck!
-I found my stick.. it was in the pool deck box. Its marked off in one pint increments for a gallon jug. I would put it next to the jug and copy the tick marks over so I had a ready measure of how much chlorine or Acid I was dumping into the pool directly from the jug. After a while I had a pretty good feel for how much was what and stopped using the stick.
Oompa Loompa Dupa-Teee Doo?

I've got a stupid pool trick for U!

Oompa Loompa Dupa-Teee Dah?

This is the stupidest thing I ever saw.