Swimming Pool

[gas]

I have downloaded a pile of info from the net on how to maintain the swimming pool. Having read the documentation I have decided either i obtain the services of a maintenance company or I sign on for a 7 year degree in chemistry at the local university.

 

I visited the local SP company, I have very little French and they have 0 english. The result was that we have been informed that we require a winter cover for the pool. The one we were shown did not look much different than the so called summer one that we currently have covering the pool.

 

Why is it necessary to have a winter cover.?

 

We have discovered a test kit in the pool house. We tested for chlorine, and the result was between 7.2 and 7.6. We also tested for ph and the results did not give a reading. in addition some form of tablets are in the test kit, what are these for. ?

 

We also have large containers for PH negative and PH positive, what are these used for.

 

Any help would be appreciated.

 

george