01/06/2026
Two-part works.
Three-part works harder.
Two-part dosing has been a foundation of reef keeping for a long time, and it works well for many systems.
Hydroshock 1 and 2 can be run exactly like a traditional 2-part, and both already include supporting elements designed to be dosed alongside calcium and alkalinity.
But as reefs grow, calcium, alkalinity, and magnesium do not scale the same way. Magnesium plays a critical role in keeping reef chemistry stable and preventing calcium from locking up before corals can use it. When magnesium is forced to live inside a calcium solution, there is a real limit to how much control you can maintain long term.
A true 3-part system gives magnesium and supporting elements their own space, allowing chemistry to stay balanced as coral demand increases.
That is why Hydroshock works as a 2-part, but works harder as a 3-part.
Same foundation.
More control.
Better long-term balance.
Dive deeper into the science behind Reef Charge and HydroShock on our blog:
https://ndaquaculture.ca/blogs/aquaculture-insights/what-is-hydroshock-reef-charge-s-3-part-dosing-system-explained
