Some of the many problems with 5-way tests are that they only test total chlorine, not free chlorine. In a clean pool, you'd have FC=6 CC=0 TC=6 where FC is chlorine free to fight off organics, CC is chlorine that's already combined with organics and indicates there may be algae present, and TC is the total chlorine. A 5-way test would just show TC=6 and you wouldn't know that your FC was down to 4 and CC was up to 2, indicating an algae bloom has already started.
The Bromine part of the test is useless as you don't use Bromine.
There's a possibly decent pH and semi decent TA test.
You're missing the 2 most important tests, a CYA test because CYA protects your chlorine from being burned up by the sun, and a FAS/DPD chlorine test that accurately measures chlorine way above 20 if necessary, and is accurate to .5ppm, and tests FC and CC separately so you know how much free chlorine you have, and if you need to worry about algae because of high CCs.
Also, pH and Acid demand kinda go hand in hand, so really your only getting a 2 way test since the only useful tests are pH and TA.
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Many many people have been where you are, wondering why they need a decent test kit, and a majority of those that didn't get a decent test kit, end up with FC far too low and an algae bloom starts, or CYA skyrocketed and an algae bloom starts. Plus that kit has no way of measuring salt, which is a vital test for a salt pool.