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.
First of all, repeat steps 1 through 7 as above. 1  Green Algae: Youâll know the second shock treatment has worked when your pool water turns from green to bluey-grey. 2  Yellow Algae: If you canât exert sufficient brushing pressure with pole brush, be prepared to brush the visible spots by hand.