Quick rock curing

[Aquattro]

Originally Posted by asylumdown

Do it in salt water. Phosphate behaves differently in salt vs. freshwater. All the different chemicals in salt water push phosphate to form a different ratio of species, and since you're going to be using the rock in salt water you want it to reach equilibrium in salt water.

This. Phosphate speciation is affected by pH, and you're better doing this in water close to the tank parameters.

A good quick read here - http://en.wikipedia.org/wiki/Phosphate