Upon removing cover from pool, you find greenish, cloudy water. This is nothing out of ordinary. Perhaps the cover is older with some small tears, which let debris into water. Superior Pool Service can get your water looking great again. Takes dedication and time to correct the issue before it turns into additional issues. Many factors to consider when balancing water to obtain healthy swimming pool. Your pool will get clean and clear again so no need to worry. Call your local certified pool operator Kale Davidson with Superior Pool Service and get the problem corrected!