Magnesium and calcium levels

[Aquattro]

You don't have anything that's really using any. The LPS will use a bit over time, but water changes would likely keep up. Those are minerals and don't evaporate, they only deplete if things are using it to grow.

[Metrontech]

So how do I get them to use more?

I mean if everyone is dosing there must be something I need to adjust

[Aquattro]

Everyone isn't dosing, only those that are and post about it. Unless you have a lot of coral using Ca for building skeletal tissue, you won't use it. If you want to use more, buy more stony coral
LPS use a bit, but grow slow. Softies use a tiny amount, nothing you'd notice. Anemones, nada.

[Metrontech]

So then do I need weekly water changes?

Is there a pro and con to not doing them?

I mean if my levels are food why bother?

[Aquattro]

Yes. Water changes replenish elements you don't test for and dilute the build up of nutrients. Reefing isn't just about Ca and Mg. 20% biweekly will likely cover all your needs, and you save a whack of cash not having to dose. Consider yourself fortunate!

[Madreefer]

Originally Posted by Metrontech

So how do I get them to use more?

I mean if everyone is dosing there must be something I need to adjust

Hey your lucky! Your saving money. The money your saving right now could be going towards SPS frags

Your parameters are good other than your Ca is a tad high. I shoot for 420