Arctic Pure
Arctic Pure | Adjust Up
Arctic Pure | Adjust Up
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Arctic Pure Adjust Up raises the pH of your hot tub water. If your test strip reads below 7.2, this brings it back into the safe zone.
Why low pH is a problem: acidic water is corrosive — it eats at heater elements, pump seals and metal fittings, stings eyes and skin, and burns through sanitizer faster than balanced water. The ideal range is 7.2–7.6.
How to use it: with at least one pump running, add one capful — that raises the test strip about one colour change. The 2 kg container's larger cap holds roughly three small capfuls. Circulate, wait at least 30 minutes before using the spa, and retest before adding more.
Quick tips:
- If pH keeps sagging no matter how often you raise it, your total alkalinity is almost certainly low — fix that first with Perfect Balance
- Several small doses beat one big one; the goal is 7.2–7.6, not "as high as it goes"
Frequently asked questions
When should I use Adjust Up in my hot tub?
When should I use Adjust Up in my hot tub?
When your test strip reads below 7.2 pH. Adjust Up raises pH back into the safe 7.2–7.6 range.
How much Adjust Up do I add?
How much Adjust Up do I add?
With at least one pump running, add one capful — that raises the reading about one colour change on a test strip. Circulate, wait at least 30 minutes, and retest before adding more. Several small doses beat one big one.
Why is low pH bad for a hot tub?
Why is low pH bad for a hot tub?
Acidic water is corrosive — it attacks heater elements, pump seals, and metal fittings, stings eyes and skin, and burns through sanitizer faster than balanced water does.
My pH keeps dropping no matter how much I raise it. Why?
My pH keeps dropping no matter how much I raise it. Why?
Your total alkalinity is almost certainly low — alkalinity is what holds pH steady. Fix alkalinity first with Arctic Pure Perfect Balance, then adjust pH.
How long after adding Adjust Up can I use the spa?
How long after adding Adjust Up can I use the spa?
Wait at least 30 minutes with the pumps circulating, then retest before getting in.
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