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.
Algae doesn't need to be the bane of your existence. The simplest way to get rid of algae is never to get it in the first place. If you maintain the appropriate free chlorine (FC) level at all times, algae will never be able to get started. The earlier you catch algae, the easier it is to get rid of.