Where is my Mg coming from?

[BraenDead]

Normally I have Magnesium problems in my tank and need to dose. Normally I measure about once a month and find myself at about 1050 or 1100 each month. I have not measured for two months, fearing I was going to be very low, but found it was 1400-1420. I know my tank did not stop using Mg, so there are two things I think may be the source of the Mg in the tank.

1. I have been using ESV B-Ionic 2 part to dose as of 8 weeks ago, used for 6 weeks.

2. 2 weeks ago I installed a calcium reactor using 30-90mm coral sand as a media (coral skeletons)

Does ESV have any magnesium, or is this coming from the calcium reactor?

Thanks,

Bob

[bertoni]

I'm pretty sure the B-Ionic has magnesium. That's my recollection.