SPS - Stability Promotes Success
You will not have stability if you have a high demand and don't dose every day.
For example, you do not want to raise your ca to 500 and let it drop on it's own down to 400 before your next water change. And if you do let it drop that much, you will not be able to raise it back up by water changes only....which leads back to daily dosing for stability....if you have the demand.
And just to make it clear, I'm talking about a SPS dominant, high calcium, high alk demand system. If you have the demand and need to dose, water changes will have very little affect on your parameters, as I mentioned with the math calculations above.
