In a swimming pool, what makes the water hard?
Recommended Calcium hardness is 200 ppm but it doesn't feel soft on the skin. Is there some other chemical making it hard?
Answer:
calcium and magnesium. these two contaminants produce what is commonly referred to as "hardness" in water.
I think zinc might. check it out on google or something to make sure.
Surface Tension...(Sorry...small joke)
It sounds fine. How many grains of hardness are there? Your pH is fine and everything else is in line. You don't want your pool water as soft as you home water.
The best thing you can do is take a sample of the water in your pool and the pool's spec, then take it to the nearest pool stores like "Pinch a Penny" or etc to test the water in your pool. After they test it they will give you the results and recommendations on how to improve the water. You can also ask them questions and etc about anything pool related.
I don't think hardness is something you feel on your skin. As long as your chlorine is high enough, you can be a little low on calcium. The reason higher calcium content ("hardness" refers mainly to calcium but also to magnesium content) is allowable in pools is because you're using calcium hypochlorite as your chlorine source (the pellets). The pool needs to be slightly alkaline to keep the chlorine from evaporating away. Ordinarily a pool will be buffered with carbonate/bicarbonate as well. Your pool guy probably checked for iron too but it doesn't sound like you're having a problem. Sounds like a healthy pool.
The answers post by the user, for information only, FunQA.com does not guarantee the right.
More Questions and Answers: