The most common cause of a goiter is lack of iodine, ...Even with the right amount of iodine, the thyroid gland can swell, creating a goiter. This can occur in any type of thyroid disease, including hyperthyroidism, hypothyroidism, thyroiditis, and thyroid cancer.
Shock treatment powder bags. Skim off whatever algae you can from the pool using a pool skimmer. Scrub the inside edges and walls of the pool with an algae brush to dislodge stuck algae. Purchase sufficient amounts of algaecide, as noted in the instructions on the bag, that match the total gallons of water in the pool.
The first thing you must do is remove the swimming pool cover. If there are leaves or other debris on the cover, use your leaf net to remove them. Then pump off any standing water if you have a solid cover. Note: if your cover has a hole in it, you will be pumping water out of the swimming pool. This can lead to draining the pool if you do not watch for this. After removing the cover, be sure to clean it, let it dry, and store for the season. You will need to add water, bringing the level up to its normal operating level.