I have a Reefer 425xl (around 115 gal i believe), and am currently doing 1.5 gal/day water auto water changes with with a neptune dos. I am using tropic marin pro reef salts, i try to keep alk between 10-11 by manually dosing red sea alk a few times a week since the salt has a lower alk. My calc is usually running around 450 and mg is around 1350 tested with apex trident. My corals always seem a little dull in color and i dont see much growth... should i be dosing any additives even though im doing daily small water changes? Thank you for any help.