GroTech Mineral pro Instant, 3000g
Sodium chloride free marine salt / Mineral salt for reverse osmosis water
Marine salt contains about 78% common salt (NaCL2) as its main component.
Hardening by the balling method produces not only calcium but also a large amount of common salt.
This results in an accumulation of common salt in the seawater aquarium.
The addition of mineral pro instant compensates for this and ensures a balanced ion balance.