Math you should do right.

Calculate true system volume after substrate, live rock, and equipment displacement. The number you should be dosing against - not the number on the box.

Hit your target dKH without overshooting. Supports BRS 2-part, Red Sea Reef Foundation, ESV B-Ionic, kalkwasser, and soda ash.

Exact salt grams for your target specific gravity. Accounts for the major reef-grade brands - Instant Ocean, Red Sea, Tropic Marin, Fritz.

Are you overstocked? Bioload-based stocking calculation that beats the "one inch per gallon" myth.