Aquatic Plant Central - View Single Post - How-To: Mineralized Soil Substrate, by Aaron Talbot

hoppycalif · 09-13-2017, 05:36 PM

Dolomite is used as a source of magnesium in the substrate - the calcium is just icing on that cake. You don't necessarily need it, because you can get magnesium other ways, in the water. Your hard water may or may not have lots of magnesium. Your water quality report doesn't say how much of either calcium or magnesium the water has, but the combination seem to range from 10-15 dGH.

09-13-2017, 05:36 PM	#541 (permalink)
hoppycalif Moderator Join Date: Apr 2005 Location: Brentwood, CA, USA Posts: 7,415 iTrader Ratings: 22 iTrader Positive Rating: 100%	Re: How-To: Mineralized Soil Substrate, by Aaron Talbot Dolomite is used as a source of magnesium in the substrate - the calcium is just icing on that cake. You don't necessarily need it, because you can get magnesium other ways, in the water. Your hard water may or may not have lots of magnesium. Your water quality report doesn't say how much of either calcium or magnesium the water has, but the combination seem to range from 10-15 dGH.