question for all you chemists out there (calcium hydroxide)

[Reef_kid]

check calcium hydroxide should be Ca(OH)2 you have calcium oxide down there and it at 95% ionization?? what are the % representing? mass?
its going to produce
Ca(OH)2 + H20 --- Ca2+ + H20 this is what you want!
but !! you have to realize that if you leave your kalc out it will react with CO2 in the air and will turn to CaCO3 and you dont want this because it ppt's out! its insoluble...

you dont actually have any magnesium hydroxide in there?
you may be thinking of magnesium oxide but this is such a small insignificant amount..

MgO + H20 ---> Mg(OH)2 milk of magnisum... solubility in H2O 0.0012 g in 100 g water

just do your stoick and see what the ratios come up with in comparison to your grams you use rather than teaspoon ect...
if the % is by mass.. you can calcualte the exact grams/mol or grams/l
and what the exact amount you will be putting in of each ,it looks like yoru not getting much magnesium out of this mix...
use a part per million conversion and again use stoic to see how much magnesium would be per gram... and look at avarage ppm in sea water that way you can see exactly how much you need to add. its kind of difficult to calculate with just average % of reactants.
hopefully your fish dont get diahrea from the milk of magnesium thtat is produced by the adition of MgO and H2O


sorry if i am not making sence ... to much chem today ... lab due tomorrow eheh...
cheers do some more research on the brand your using ..
i worrie about contamination of heavy metals and age.. due to the ppt of calcium carb ... if you notic a lot of settlement in the bottom of a jug of your solution .. its most likly the calcium carb.