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BaquaSpa Chemicals

Frequently Asked Questions

No matter which sanitizing system you choose, keeping the water balanced is essential to your enjoyment of the spa. Water is balanced when pH, total alkalinity and hardness are all within the proper range. Problems arise when any of these factors are too high or low. Unbalanced water can become corrosive or cause the formation of scale deposits. Corrosive water also attacks the integrity of metal components, pitting, etching and staining them. Scale formation causes cloudy water, surface staining or short filter cycling. Any of these conditions can cause problems for the spa, and irritations, especially of the eyes and skin, for the people using it.

What is calcium hardness?

All water contains some natural hardness, and it varies by geographic region. Calcium Hardness is the amount of dissolved calcium in your spa water. The correct hardness range is 200-400 parts per million (ppm).

Raising calcium hardness (CH) with BaquaSpa Calcium Hardness Increaser
Desired CH Increase   Spa Volume (gallons)
in (ppm)   150 200 300 400 500
             
20   ½ 1 1 ¼ 1 ½ 2
40   1 ¼ 1 ½ 2 ½ 3 ¼ 4
80   2 ½ 3 ¼ 5 6 ½ 8
120   3 ½ 5 7 ¼ 9 ½ 12
160   5 6 ½ 9 ½ 13 16
200   6 8 12 16 20
240   7 ¼ 9 ½ 14 ½ 19 ¼ 24
 
All measurements are in dry ounces.

What is total alkalinity?

Total alkalinity is the amount of "buffer" present in water. These buffers prevent drastic changes in pH, called "pH bounce." The proper Total Alkalinity range for spa water is 80-120 ppm.

Raising Total Alkalinity (TA) with BaquaSpa Total Alkalinity Increaser
Desired TA Increase   Spa Volume (gallons)
in (ppm)   150 200 300 400 500
             
20   ¾ 1 1 ½ 2 2 ½
40   1 ½ 2 3 4 5
60   2 ¼ 3 4 ½ 6 7 ½
80   3 4 6 8 10
100   3 ¾ 5 7 ½ 10 12 ½
120   4 ½ 6 9 12 15
 
All measurements are in dry ounces.
Lowering Total Alkalinity (TA) with BaquaSpa pH Decreaser
Desired TA Decrease   Spa Volume (gallons)
in (ppm)   150 200 300 400 500
             
20   1 1 ½ 2 3 4
40   2 3 4 6 8
60   3 4 6 8 10
80   4 5 ½ 8 11 14
100   5 6 ½ 10 13 16
120   6 8 12 16 20
140   7 10 ½ 14 21 24
160   8 12 16 24 28
180   9 13 ½ 18 27 32
200   10 15 20 30 36
 
All measurements are in dry ounces.

What is pH?

pH has the greatest effect on water balance. The pH of water is a measure of how acidic or basic it is. The pH scale runs from 0-14, with 7.0 considered pH neutral. Anything below is acidic; above is basic. The ideal pH for the BaquaSpa Water Care System is 7.2-7.8. Using BaquaSpa Test Strips, test your spa's pH weekly. It's simply to adjust. When the pH falls below 7.2, add BaquaSpa pH Increaser. When the pH rises above 7.8, use BaquaSpa pH Decreaser.

Raising pH with BaquaSpa pH Increaser
To Raise pH from...   Spa Volume (gallons)
    100 200 300 400 500
             
below 6.8   ¼ ½ 5/8 ¾ 1
6.8-70   1/8 ¼ 3/8 ½ 5/8
 
All measurements are in dry ounces.
Lowering pH with BaquaSpa pH Decreaser
To Lower pH from...   Spa Volume (gallons)
    100 200 300 400 500
             
above 8.2   ¾ 1 ½ 2 ¼ 3 3 ¾
8.2   ½ 1 1 ½ 2 2 ½
8.0   ¼ ½ ¾ 1 1 ¼
7.8   1/8 ¼ 3/8 ½ 5/8
 
All measurements are in dry ounces.