Adjusting Calcium Hardness In Swimming Pools And Spas

Adjusting calcium hardness is a task that should be done very carefully. This process involves you having to partially drain your pool and re-fill it once again. On the other hand, you may have to add some calcium chloride as a source of calcium treatment because your pool calcium hardness is too low.

No one like to drain the water from their swimming pools or from their spas for that matter. However, in some cases it will require you to do just that because your calcium hardness in your pool or spa is too high.

If this is so, the necessary steps to correct it must be done. Failure to lower your calcium hardness to the required level set by the swimming pool and spa industry will result in an unbalanced pool water chemistry and an uninviting swimming pool or spa.

Adjusting Calcium Hardness Using Calcium Chloride

There will be times when you will need to raise or increase your calcium hardness through frequent adjustment.

The table below provides you with some important guide lines that will help you reach the desired ppm level of calcium hardness in your swimming pools and spas respectively.

Desired ppm levels400 Gallons1000 Gallons5000 Gallons10000 Gallons20000 Gallons50000 Gallons100000 Gallons
10 ppm0.77 oz1.92 oz9.61 oz1.20 lbs2.40 lbs6.01 oz12.0 lbs
20 ppm1.54 oz3.85 oz1.20 lbs2.40 lbs4.81 lbs12.0 lbs24.0 lbs
30 ppm2.31 oz5.77 oz1.80 lbs3.61 lbs7.21 lbs18.0 lbs36.1 lbs
40 ppm3.08 oz7.69 ox2.40 lbs4.81 lbs9.61 lbs24.0 lbs48.1 lbs
50 ppm3.85 oz9.61 oz3.00 lbs6.01 lbs12.0 lbs30.0 lbs60.1 lbs
60 ppm4.62 oz11.5 oz3.61 lbs7.21 lbs14.4 lbs36.1 lbs72.1 lbs
Adjusting Calcium Hardness in Swimming Pools

Before adding the swimming pool chemical calcium chloride to your pool or any swimming pool for that, it is highly recommended that you mix the calcium chloride pool chemical in a bucket or mixing drum first. After you have dissolved the calcium chloride contents, add it to your swimming pool water by pouring it in into your pool. However, make sure that you brush the bottom of the pool or spa thoroughly.

By thoroughly bushing the bottom of the swimming pool, you stir up any undissolved chemical material that may have settle on the bottom of the pool surface. Make sure that you read the manufacturer's SDS (Safety Data Sheets) that accompany your swimming pool or spa chemical during shipping and delivery. The information provided by the manufacturer will give you specific guidelines on how the pool chemical is to be handled and used before you attempt adjusting calcium hardness.

Adjusting calcium hardness is part of total alkalinity!

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