OK,
I'm a bit confused: Your numbers look EXCELLENT!

I have no idea why anybody worries about TDS--it has little if any effect on your pool--it MIGHT indicate the presence of metals--but they should be tested for separately. You already have a good calcium and total alkalinity number.

I have no idea why PoolSean thinks your CYA is low at 30ppm. I might consider going to 40 or 50 ppm given your conditions, but I do not like going higher. Your FC is FINE for 30ppm

The only baffling thing is if you are using tri-chlor tabs in a feeder and di-chlor powder to supplement, why is CYA only 30? This has been picked up by the other posters.

There are only two possibilities (also noted by others):
1) You have a leak and are re-filling all the time such as by an auto-leveler (they sound so complicated but they work just like a bathroom toilet's float valve--that simple)
2) Your pool store tested wrong. Could they really do that?????? Well, yes. You can get more accurate numbers from the $15 WalMart HTH 5-Way test kit (if you can still find them in your area--long gone in mine). And, of course, from Ben's kit or the Taylor kits. I suspect your CYA is much higher.

Someone said Ben recommended higher CYA levels. That's not exactly right. Ben HAS said there is no problem with running higher CYA levels as long as you follow the rules of keeping your FC at the approriate levels, and you might see less see-sawing of FC.

But everyone seems to forget that Ben has also posted another article showing that the advantages of higher CYA levels fall off dramatically once you get much above 25-30ppm--you don't protect chlorine much and you lose effectiveness...So which is true?

So I generally aim for 30, and if like the originally poster, I am in for weeks or months of plus 90 sunny weather (and, yes, we get that in New Jersey--my backyard frequently hits 100 by mid to late May), I may run CYA to 40 or even 50, especially if I seem to use a lot of chlorine.

But you have to be careful--despite doing that last summer I had a minor algae bloom--the first in this pool and the first in years. I hammered it 3x a day with FC levels of 15-20ppm and in 24 hours it was gone, and in 48 I was back to normal. I was annoyed and annoyed with myself...I broke my own rules and paid for it.