This is my first occasion of owning a swimming pool and I really need some guidance. My pool is very green. We have a fairly large ground pool with a sand filter . We replaced the sand in the filter about 8 months ago. Four days ago I put chlorine in the pool, still the water is green, and on this occasion, will be drained and the pool will undergo minor maintenance, and will then be refilled. I will be using my villa as a holiday home, visiting at approx. 6 week intervals, and I guess will therefore need to find someone to maintain the pool, such as chemicals and skimming, in my absence, to make the pool usable when I visit during the Summer months. Can you make any recommendations of pool cleaners? I came across certain layouts of the soldapools last day but not sure how well they are. Have you had a previous experience with them.