In time, usually, it settles out. But, if you want to speed up the process you can add bacteria to the system. Most of the bacteria that you add will colonize the filter, colonize the gravel, and outcompete the nuisance bacteria thatâs colonized the water column for nutrients. You can also use a UV sterilizer.
TSH (with a half life of about an hour) stimulates the thyroid gland to secrete the hormone thyroxine (T4), which has only a slight effect on metabolism. T4 is converted to triiodothyronine (T3), which is the active hormone that stimulates metabolism.
TSH is produced when the hypothalamus releases a substance called thyrotropin-releasing hormone (TRH). TRH then triggers the pituitary gland to release TSH. TSH causes the thyroid gland to make two hormones: triiodothyronine (T3) and thyroxine (T4). T3 and T4 help control your body's metabolism.