I am not entirely sure, but blitzing is a post fermentation process where you blend the peppers with vinegar and xantham gum so they are ready to be mixed into a base for a sauce or added to a sauce? I have seen the term too but could some one clarify it a bit further?
The ph level below 4.6 would be considered pantry and shelf safe. Refrigerating sauces is a safer way to be sure, but if you get a sauce below that level you would be okay to put in a pantry for a year or so. A cool dark place preferably. My sauce rarely last long enough for me to know how long ita good for, or to obtain an average. By the time I bottle and give to family, friends, and myself I dont have to worry too much. Extra peppers I dry and make powder or I freeze for cooking and sauce making in the future during the off season.
There is two main ways to drop ph in a recipe. Acetic Acid (vinegar) or citric acid (lemon or lime juice). Combine both for a balanced flavor or use one or the other. I recommend vinegar mostly. Really helps with the consistency and flavor. Too much citric acid can make it hard to palate, but then again too much vinegar can do that too.
My advice is to refrigerate and invest in a nice ph meter instead of strips. Basing food safety on a colored strip which may be off due to the color of sauces is a little risky. You can find ph meters on Amazon for 10-20 bucks that work well or go big and get some fancy ones for more. I have never used a super fancy one.
Digital Ph Meter Tester 0.01 PH Accuracy Water Quality Tester with ATC 0-14 Measurement Range with Plastic Box for House Water,Hydroponics,Aquariums,Pool,6 pH Buffer Packets calibration(with battery) https://www.amazon.com/dp/B07DGKSPDJ/ref=cm_sw_r_cp_apa_i_cnfxDbC22V4DZ
This is one I recommend.
im know nothing about stepwell living soil, but super soils should feed it for at least most of its life, may have to help in flower, but youre right to not feed them yet.
i dont know your budget but you can get meters that check ph and moisture in soil for $10 usd. they are shitty but it is a ph tester for cheap. they make digital ones for about $25. you can get digital ph pens for water for cheap too i personally would avoid the cheapest ones. blue lab makes quality testers but you wont find a new one under 100$
cut the light back a bit. do like 18/6 or 20/4. plants develop more roots during night time. its not like they dont when the lights are on, just when lights are on plants prioritize storing energy as to spending it. some strains get stressed as well from 24 hours light.
dont let your water sit for 4-5 days. get a air pump and stone and bubble it. this thing is good enough to bubble the water in a 5 gallon bucket. or if you can get a chlorine filter.
definitly test the soil and your water going in to see where its at. as you just water, the ph of the water shouldnt matter to much. but if your soils to acidic and youre adding acidic water, or if its to alkaline and youre adding alkaline water, problems compound. you probably just transplanted into to rich of soil as super soils tend to be very rich. plant got stunted as a result. if its been 2-3 weeks since transplant they dont look dead so they should recover, just will take some time