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I'm no water expert but 2 TBS of dichlor post soak every day seems a little excessive. I would think 1 TBS should do the job of getting your water to the 3-5ppm range 20 min after dosing with a tub your size. What do you use to test with? Have you been checking the FC level 20 min after your post soak dose? What kind of dichlor do you use and what is it's % of active chlorine? If you smell chlorine it's probably time for a shock as that's a good sign you have a high amount of chloramines(CC) present.
One of the benefits of BaquaSpa is gentle on the hair.
Bama, You really shouldn't be getting a chlorine smell. I've been told that if you do smell chlorine, you either have high levels or it's time to shock the tub. You said you tested the tub before getting and it a slight positive reading? Is this below 2 ppm? You toss in two tablespoons after each use? What levels are you getting 10 minutes after adding 2 tblspoons? (you want it around 5 pmm, not more than that, not less than 3 ppm). How many times has the tub been used since the last time you shocked?
Is there a reason to wait 20 minutes before checking and treating?
I use SPA TIME chlorinating granules for spas and hot tubs: active ingredient' sodium-s-triazinetrione.
Are some brands of test strips better than others?
Are some brands of dichlor better than others?
How about a routine something like this:Dichlor after use, generally 0.5 teaspoon per person, but you can test this and just get your tub to between 3-5ppm after dosing. You have a big tub so you may need more. Hopefully by the next day when you are ready to use the tub again you'll be down below 1ppm.