Top ofg

[Roscoesanchez]

Just curious if any of you have put magnesium in your top off

 

[DeepBrew]

I just use RO/DI for my top off water. I do 10% water changes per week which helps to replenish Mg. I rarely need to add Mg, but I don't have large SPS loads in my tanks.

 

[Randy Holmes-Farley Verified Community Expert]

I wouldn't. It cannot be mixed with limewater (what I use in top off) and magnesium depletion is so very slow that it doesn't need to be added often. Some people never need to add any.

 

[GoVols]

Just curious if any of you have put magnesium in your top off

I don't.
I may only have to bump mag maybe once a month but check it once a week

Also, I've been using Fritz RPM salt for my weekly water changes.
1/2 cup per gallon mixes to...
1.025Sg
Cal - 440-450 (Red Sea Pro)
Alk - 8.5 - 9 dkh (Red Sea Pro)
Mag - 1400 - 1425 (Salifert)