Raising Mg -- how fast?

[geno]

I tested all (most) of my water parms today and everything looked very good with the exception of Mg. It was low (1030).

How fast can I safely raise it? I have the solution from BRS mixed and have been adding it at about 60 ml per day for the past week. Is it safe to add it faster?

 

[johnr2604]

100ppm a day

 

[schwaggs]

Typical tank inhabitant are not sensitive to Mag swings, although limiting it to 100ppm per day as John suggests isn't a bad idea. Watch your salinity as Mag will raise it although a couple hundred ppm might not impact it too much. I add the suppliment to my top off water and drip in in over an hour or so.

 

[jennm]

Biggest issue with hyperdosing magnesium is that many products contain or produce ammonia.

Jenn

 

[johnr2604]

JennM;434645 wrote: Biggest issue with hyperdosing magnesium is that many products contain or produce ammonia.

Jenn

Yep :up:

 

[weaglereefer]

Little bump back to the top, so would it be recommended to add a capful of prime with every dosing that raises Mg 100ppm?

 

[johnr2604]

au01st;435347 wrote: Little bump back to the top, so would it be recommended to add a capful of prime with every dosing that raises Mg 100ppm?

I wouldn,t worry about the prime. This is the reason you only raise it 100ppm. The biological filtration will make short work of any ammonia created by raising it slowly.

 

[acroholic]

I took my 300 gallon system from 1290 to 1350 last night. I added 1.5 liters of Randy's 2 Part. I'm always amazed at the volume of mag supplement you have to add.
Dave

 

[slayer]

i raised mine from 700 to 1400 by 200ppm a day last week. but i have no fish. My coral seemed to do fine. But my alk did drop to 7 from 10. quick fix with 2 part though corrected that.

 

[geno]

Hey Dave, you added 1.5 liters at one time????? No issues???

I use the mix from BRS and have been adding 2 of the dosing cups that come with their 2-part solution each day. I had been adding only 1 dosing cup per day but there was no real change in the Mg reading.

Perhaps I can step it even more??

-gene

 

[schwaggs]

On my 500 gallon system, dose on the order of 3 cups (dry) of Mag Chloride with 6 TBS (dry) Mag Sulfate in a couple gallons of fresh water at a time (dripped in over a couple hours. I think you can go quite a bit faster than 2 cups of solution a day...

 

[acroholic]

Corals don't have much of a reaction to magnesium additions. I use a ratio of 10:1 mag chloride to mag sulfate: 3 5/8 cups mag chloride + 3/8 cup mag sulfate added to 1/2 gallon RODI. It is AKA Randy's 2 Part Solution.
Dave