Marquis ATV-14 Owner's Manual page 31

total alkalinity
Alkalinity acts as a buffer to prevent the pH from changing as other
sub¬stances are added to the water. Stability of the pH is directly related to
the alkalinity. The alkalinity should be between 80 - 140 ppm. Alkalinity below
80 ppm makes it difficult to stabilize the pH. Alkalinity above 140 ppm may
increase the pH and cause cloudy water, scaling, and decreased efficiency
of the sanitizer.
Note: Alkalinity & pH Increase and Alkalinity & pH Decrease will affect both
the pH and alkalinity. Generally, smaller additions will change the pH and
have a very minor effect on the alkalinity. Larger additions will also affect the
pH, but will have a much greater effect on the alkalinity. (Example: If the pH
is very high and the alkalinity is within range, adding a few smaller doses of
pH and alkalinity Decrease instead of one large dose will reduce the pH with
little effect on the alkalinity.)
Calcium hardness
Do not use soft water in your vessel. It is critical to have calcium in your
water. The ideal range of calcium is between 200 – 300 ppm. The calcium
hard¬ness is normally adjusted when filling or refilling after draining the ves-
sel. High calcium levels can cause scale buildup on vessel surfaces and
equipment. Your vessel can be protected against high calcium by using
Metal & Stain Remover per the directions on the container. Low calcium lev-
els can cause vessel water to become highly corrosive and damaging to the
equipment components and plumbing. To raise calcium levels, use Calcium
Hardness Increase.
Balance
When initially filling or refilling your vessel, follow these steps to achieve
proper water balance.
Important! Always follow instructions on the chemical container when add-
ing chemicals.
1. Test the vessel water using a test strip or test kit. Determine the pH and
alkalinity of the water.
2. If adjustments are needed for the pH and/or alkalinity, always balance
the alkalinity before balancing the pH. The product(s) you should use to
adjust pH and/ or alkalinity are pH Alkalinity Increaser or pH & Alkalinity
Decreaser. Make any additions per the directions on the bottle and then
test and repeat if necessary until all readings are in the desired range.
3. Increase the calcium hardness if necessary.
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