Poolplaza Pool Supplies - Home
 Pool Supplies shopping:  | Pool Filters Pool Pumps Pool Cleaners  |  Pool Heaters  |  Salt Systems  |  Pool Parts 


Pool Chemistry> Calcium Hardness:  |  Intro  Testing  |  Adjusting

Calcium Hardness - Introduction


Calcium Hardness

Calcium hardness is a measure of the dissolved calcium in water.  This level is not tested very often, but it should be checked and adjusted after the pool has been freshly refilled and it should be checked every 4-8 weeks thereafter.

Normally, the calcium hardness level should be maintained at a minimum of 250 ppm.  If the calcium hardness level exceeds 500 ppm, then the pool may need to be drained partway and refilled.  Normally calcium hardness levels to not get too high unless the pool is using large amounts of calcium based chemicals (such as calcium hypochorite).

There are a couple of problems that can result from having improper calcium hardness levels.

If the calcium hardness is too low, then the calcium starved water may leach calcium out of the plaster, causing pitting.  This requires a very low calcium hardness.

If the calcium hardness is too high, then cloudiness or scaling may result.  By maintaining a slightly lower alkalinity and pH, the impact of a higher calcium hardness can be minimized.  In our experience, the majority of scaling problems occur right after the pool is replastered and is the result of plaster dust that adheres to the surface. 

POOL School - exclusively from POOLplaza.com

Pool Cleaners
Booster Pump Driven
Pressure Side
Suction Side

Salt Systems!
How It Works
Choosing a System
Sizing a System

Pool Pumps
Choosing a Pool Pump
Pump Troubleshooting

Pool Filters
Sand Filters
DE Filters
Cartridge Filters
Choosing a Filter

Backwash Valves  
Push-Pull Valves
Multiport Valves
Bottom Valves
Separation Tanks

Chemical Feeders  

Valve Settings
Valve Actuators
Ortega Valves
Jandy Valves
Gate Valves
Ball Valves
Check Valves

Water Chemistry

pH Balance
Total Alkalinity
Calcium Hardness
Salt Systems

Pool Maintenance
Leaf Bagging
Plaster Care
Chemical Care
Equipment Care
Seasonal Maintenance

About Us
What They Are Saying...
Contact Us
Privacy & Security

POOL School - exclusively from POOLplaza.com<img border=

Pool Supplies Home
   |  Pool Cleaners  |  Pool Heaters  |  Pool Pumps  |   Pool Filters  |  Pool Parts
  POOLplaza Inc. does not make any warranty or representation, either expressed or implied, regarding the accuracy or completeness of the information provided by this website; nor does POOLplaza Inc. assume any liability of any kind whatsoever related to, or resulting from, any use or reliance on this information.  The content of this website should not be used, if it is conflict with any applicable federal, state or local regulations or guidelines.
Copyright 2014 POOLplaza Swimming Pool Supplies - Dallas,TX. All rights reserved. Terms and Conditions