Cyanocobalamin is a form of vitamin B12 derived from cyanide and should be avoided
Obviously, constantly draining the system is wasteful of water and today the newer blowdown systems will generally operate with water quality/conductivity sensor activating the blowdown function when a certain set limit is reached

Source: Wikipedia Ingredients analysis Palm oil content unknown Unrecognized ingredients: quality-purity-potency-kirkland-signature-vitamin-b12-is-a-factor-in-the-maintenance-of-good-health-and-helps-the-body-to-metabolize-carbohydrates, at, vhelps-to-produce-red-blood-cells-helps-to-prevent-vitamin-b12-deficiency-non-gmo-no-starch-sweeteners, preservatives-vegetari-dosage, adults-19-years-and-older, dissolve-1-tab-der-the-tongue-once-daily, no-lactose-no-icial-each-tablet-contains, medicinal-ingredients-vitamin-b12, methylcobalamin, 1200-mc-non-medicinal-ingredients, alphabetical, croscarmellose-sodun-cospovidone, dimalic-acid, stewvg, vegetable-magnesium-stearate, warning, consult-a-health-care-practitioner-prior-to-use-if-you-are-pregnant-and-breastfeeding, store-between-15c-and-25c, out-of-the-reach-of-children-made-in-canada, fabrique-au-canada-vendor-1-888-446-8874-nutricorp-international, windsor-ontario-n8w-5b5-k2e-1c5, faisant-affaire-au-quebec-sous-le-nom-les-entrepots-costce-do-not-use-if-seal-under-cap-is-broken, manufactured-by, fabrique-par, uaux-for, pour, costco-wholesale-canada-ltd, 415-west-hunt-club-road, ottawa-onta-www-costco-ca-npn-80081901 Some ingredients could not be recognized

Much like the childhood immunization cards, Novitas has published a card that patients can use to track their Medicare Preventive Services here (external link)