What is considered stable?

[Shnetts]

What would you consider stable when it comes to params, like how much variance is considered stable.

 

[Dburr1014]

My temp moves less than 1 degree.
My alk I test at the same time of day and that is 0.1 in a few days.
But there could be outliers every so often.
Ect...

 

[Shnetts]

My temp moves less than 1 degree.
My alk I test at the same time of day and that is 0.1 in a few days.
But there could be outliers every so often.
Ect...

What would you say for Mag and calcium?

 

[Dburr1014]

What would you say for Mag and calcium?

Mag barely moves at all. Calcium I don't worry to much. It moves less than alk. I test every couple weeks for calcium and once a month for mag.

 

[Shnetts]

Mag barely moves at all. Calcium I don't worry to much. It moves less than alk. I test every couple weeks for calcium and once a month for mag.

Really? Mag I would think would move around the most, id always look at 1250-1300 to be pretty stable to me.

 

[Dburr1014]

Lots of info here:

Thread 'Just say NO to magnesium testing: RMM is born' https://www.reef2reef.com/threads/just-say-no-to-magnesium-testing-rmm-is-born.1017528/

 

[gbroadbridge]

Really? Mag I would think would move around the most, id always look at 1250-1300 to be pretty stable to me.

Mg cannot move by much as it is very high to start with and very little is consumed.

If you're seeing movements between tests it is simply test error.

 

[gbroadbridge]

What would you consider stable when it comes to params, like how much variance is considered stable.

The only chemical parameters that really matter are Salinity (as everything moves with it) and Alkalinity which is the most volatile.

My Alk stays within 0.2 dKh with automated measurement and dosing.

Ca and Mg I measure once a month and barely move.

If you keep those two stable coral growth will take off

 

[Reefer Matt]

I consider parameters stable when I see the same trends everyday for a week. Your tank will usually tell you how much you can deviate from your target.