Don’t Forget to add Natural Chemistry’s Spring and Fall to your pool a week or two prior to closing for the winter. It will help remove organic materials from the water, remove oils from your filter, and removes harmful phosphates that will feed algae growth. It really helps make the pool opening next spring easier, quicker, and less expensive. It’s also very important to regulate your chemicals before you close the pool. Bring in your water sample and we can let you what you need before you close your pool.