How do you maintain your MAG / CALCIUM levels

[Delphinus]

Originally Posted by The Grizz

I was looking at J&L's site and ZeoVit has a mag complex anyone try it?

No experience with that one specifically but I've found with other liquid additives that it was too expensive to maintain 1400 in the tank. It shocked me how much "product" (of any kind) was required to raise Mg by 100 points. So I switched to bulk, I buy like 20-30 lbs at a time and it lasts around a year.

Once you have your tank to the level you want how much do you dose per day / week?

I find it depends on what you have, some things seem to deplete it faster. Anemones of all things I found seem to benefit from Mg a lot, I can always tell when my tank Mg is low by looking at the anemones and how open they are. So I test and adjust as needed but I tend to just adjust the new SW and then do a water change. Eg. if it's low in the tank then I adjust the incoming tank water to be higher and it sort of evens out.

I think I did once hear though that if you track your Alk depletion, your weekly dosage of Magnesium is similar to a daily dosage of Alk. Not sure if that's true all the time and I never bothered to test that hypothesis on my own tank. I just test Mg on occasion and then adjust as needed.

[Palmer]

I use a Dow pellet for Calcium Chloride and run of the mill baking soda for Alk. I supplement Mag with Epsom salt.