Magnesium Dosing

[Wayne]

Ok I just measured my magnesium levels after a water change and its way low. I measured about 800 ppm. So I pickup up some Kent Magnesium and it saies to add 1/4 tsp for every gallon. So for my 30 gallon tank I need 7 1/2 tsp... That seems like a lot... No?

[xtreme]

1/4 tsp per gallon will increase it by how much? I suspect you will need a lot more than 7.5 tsp to get it to the level you need. Just do it over the course of a few days, it is recommended you don't increase by more than 100ppm per day.

[Wayne]

Originally Posted by xtreme

1/4 tsp per gallon will increase it by how much? I suspect you will need a lot more than 7.5 tsp to get it to the level you need. Just do it over the course of a few days, it is recommended you don't increase by more than 100ppm per day.

It saies add that much per day to bring the level to between 1250 and 1350. It will rise 18.3 ppm/day. So I just dose that much a day till I reach those levels... Oh um yeah I got it figured out.

I guess the amounts have to be that high because it is like one of the top 3 ingredients in sea water right?

[xtreme]

This calculator might help, although it doesn't look like Kent dry Mg is on the list. It should still help give you an idea of the amount needed to get up the NSW levels.

http://home.comcast.net/~jdieck1/chemcalc.html

[Wayne]

Oh its actaully Kents Tech M Magnesium (Liquid). Its actually on the list... Wow I am going to need 730ml... I need a few more bottles. Is there something that is more concentrated?

[xtreme]

I get my calcium and magnesium from the Chemmaster. I have a large system and this is the most economical way of dosing.