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.
Mustard algae is rare and often mistaken for sand, dirt, or a stain in your pool. Itâs not slimy like regular green algae, but it likes to attach itself to pool walls and other items. Itâs also chlorine-resistant and very stubborn. It can even live outside of your swimming pool.