Aquatic Plant Central - View Single Post - [Wet Thumb Forum]-Calcium dosing to increase GH

javalee · 12-12-2005, 05:36 PM

If I had a scale, I personally would have calculated the molar ratio

, but since I don't, I just assumed that Ca+2 and Mg+2, having the same charge, would react in the same way with the reagent in my GH test kit. So I raised the degree of hardness first with Mg, then 4 times that amount with Ca. I may be off on this, but I didn't think my plants would punish me too much if I were.

I'll check out the calculator next time. Epsom salt is hydrated so you would have to include the weight of 7 moles of water per mole of MgSO4.

12-12-2005, 05:36 PM	#6 (permalink)
javalee Senior Member Join Date: May 2006 Location: Louisiana Posts: 142 iTrader Ratings: 0 Plant Points: 6200	If I had a scale, I personally would have calculated the molar ratio , but since I don't, I just assumed that Ca+2 and Mg+2, having the same charge, would react in the same way with the reagent in my GH test kit. So I raised the degree of hardness first with Mg, then 4 times that amount with Ca. I may be off on this, but I didn't think my plants would punish me too much if I were. I'll check out the calculator next time. Epsom salt is hydrated so you would have to include the weight of 7 moles of water per mole of MgSO4.