Salt & Additives

Reef salt and additives

Good water starts with good salt. Our reef salt and additives include sea salt mixes for water changes and supplements that replace what corals use. You'll find calcium, alkalinity, magnesium and trace elements.

Keeping your water stable

Stony corals use calcium and alkalinity to build skeletons. As they grow, those levels drop. So most reefers replace them with two-part additives, a dosing pump or a calcium reactor.

Stability matters more than chasing perfect numbers. So test often with good test kits, and make small, steady changes.

Common questions

How much salt do I need for a water change?

Most reef salts need about half a cup per gallon. Always check the bag, and mix to your target salinity with a refractometer.

Which additive should I start with?

Start with alkalinity, since it changes fastest. Then add calcium and magnesium as your coral load grows.