Calcium Reactors

[Alexander1312]

High precision hydrometers are old school technology, yet serves as one of the best salinity tools out there IMO.

Nothing wrong with old...its proven to grow corals..just like all of the other methods.

The difference is that nothing has come close to the accuracy of hydrometers except much more expensive conductivity meters.

The inverse is the case regarding ca reactors. Much simpler methods have been developed that get much easier to target parameters.

Also, a thermometer, invented in 1612, is an old school ‘technology’ which is still a proven way to measure temperature .