Magnesium ideas

[boxfishpooalot]

Why dont we just use another form of magnesium to supplement it? Why not use one of theese, would they work?

-magnesium bicarbonate
-magnesium oxide
-magneisium peroxide
-magnesium dioxide.
-magnesium gluconate
-magnesium hydroxide(milk of magnesia)

All of theese im thinking will add nothing to the water but magnesium. Am I wrong?

 

[Icefire]

wrong, they add oxide/peroxide/etc

They need to be soluble and don't cause precipitation.

Need to be available/not costy too.

magnesium bicarbonate add alkalinity

 

[marsh]

Oxidizers
magnesium oxide
magneisium peroxide ?= magnesium dioxide

Alk
magnesium bicarbonate
magnesium hydroxide
magnesium oxide (present in quicklime)

Carbon
magnesium gluconate

I am no chemist but it seems you would want to avoid oxidizers

In terms of those that would cause increase in alk there would be problems given the quantity of Mg that must be added to a tank to get X ppm rise in Mg would result in an unacceptable Alk rise.

Mg gluconate -

Gluconic acid is the carboxylic acid formed by the oxidation of the first carbon of glucose.
Again the quantities of Mg often needed would result in a very, very large carbon addition and complications from that. Better to add tablespoons of straight glucose or sucrose if you desire carbon additon for high nutrient control...if that is how you wish to control nutrients.

 

[bertoni]

The gluconate should work, but it will likely add alkalinity, too, and I got tired of the cyanobacterial bloom from calcium gluconate. I agree that the oxide and hydroxide are the equivalent of lime. The bicarbonate would seem to dissolve at 100 ppm or so, but I'm not enough of a chemist to be sure. It'd obviously add alkalinity.

 

[boxfishpooalot]

Well crap im out of ideas. Except for maybee magnesium citrate. Whats the citrate part going to do?

Another possiblity is nigari salt. Its got a 10:1 ratio of chloride and sulphate as its derived from seawater.

 

[marsh]

Bertoni

Wouldn't the gluconate be a big carbon addition like glucose?

Box

I bet citrate will be be a big carbon load also...my recollection it is part of the Kreb's cycle.

Mg carbonate is like Dolomite CaMg(CO3)2

 

[bertoni]

Yes, I think that's why it seemed to cause cyanobacteria blooms.