I added an extra 10g of magnesium, for a total of 15grams in 15 gallons of water and low and behold the numbers matched up this time. I measured an increase of 113ppm per gram per gallon. (brightwell says 114.4ppm per gram per gallon)
To increase calcium I ended up adding another 8 grams for a total of 25g for 15 gallons of saltwater.
I must have screwed up the second test for mag somehow after adding the first 5 grams. Unless the mag reading was off because of low calcium?
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- 33 Gal - 20Gal Sump, MP10/Hydor Powerheads, Aquaticlife 4x T-5HO, Vertex IN100, TLF w/Biopellets, Tunze ATO
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