Welcome to TFP! As mentioned above, I was also unsure of your question. So I went back and re-read it twice to see if I could maybe find what you were trying to ask. Didn't really find anything. First, let me point out that I am not a TFP expert, but I am learning and reading every day. If I live long enough, maybe someday I'll become a pseudo-expert.
The advice you were given was good, insofar as the info you supplied: #1. Without a reliable way of testing your own water, you are at the mercy of the Pool Store and its wall of potions, additives, magic sticks, etc. #2. The suggested articles are an excellent source of knowledge to have as a base in order to use the TFP methodology and get your questions immediately answered.
I believe you are trying to decide if TFP is for you. Maybe
that is the unasked question. It will only work if you want it to. It absolutely won't work if you try to mix/match pool store methodology with TFP. Ask me how I know. Using TFP, you will know exactly what to add, when to add it, how to add it, and what to expect as far as interactions with other things in your water. No surprises! Now, armed with a proper test kit and some basic TFP knowledge, your questions will gladly get answered until you run out of questions (or just get sick of us continuously trying to help you!)
As far as a good test kit is concerned, TFP recommends a couple: the Taylor K2006C, available on Amazon and the TF100, available from TFTestKits, which is the one I use. At first glance, either kit appears pricey, compared to the kits at the pool store. Those kits generally do not allow the testing needed to let you run your own pool. Most allow you just enough testing to keep going back to the pool store to stock up on more stuff.
I recently posted that I received a sale catalogue from one of the major online national retailers of pool supplies. The first 16 pages are all additive chemicals for your pool, 110 of them. So far this year in our 24' x 52", 13,500 gallon above-ground pool, I have added four things: #1. 10% concentration of liquid chlorine (from Walmart, Home Depot, Lowe's True Value, etc.) About four gallons @$4.60 ea. #2. Granular stabilizer (from the same places, plus Amazon, or even the pool store. The pool store is the most expensive, BTW.) 18 oz. out of a 4-pound bag, around $23.80. #3. 20 Mule Team Borax (the grocery store!) 6# @ $5.27 per four-pound box. #4. Well water from our well. That's It! So, my cost so far is chlorine: $18.40, stabilizer: $6.00, 20 Mule Team Borax (pH-up at the pool store

$7.90. Grand total: $32.30. The cost of a good test kit is way more than covered by the savings I've realized utilizing TFP instead of the pool store.
Lastly, TFP is
not a profit center; we sell nothing and power our site with voluntary donations. Your other choice... well, take your water in for a (free) test, and see what they
think your pool needs! I can almost guarantee you could buy a good test kit for far less money!
Hopefully, I've helped to answer your non-question. LOL. We're just waiting to see if we can help you. Now, if you
should have some questions

, ask away, and we'll see what we can do to answer! NO more

face, OK?
Enjoy your day!
G.