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Hello all. I could be misunderstanding this but here goes.

Your addition of 1.5 tsp/caps MgSO4.7H2O to your 75.0 gal aquarium adds Element ppm/degree Mg 2.66 S 3.51 dGH 0.61

I'm not sure how 2.66ppm of Mg relates to 0.61 dGH? My understanding is that 1 dgh = 17.8ppm.

2.66ppm of Mg should raise hardness only .15 degree. Even if the sulfur content is added the result would be very wrong too.

Any idea what's going on there?
 

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Hello all. I could be misunderstanding this but here goes.

Your addition of 1.5 tsp/caps MgSO4.7H2O to your 75.0 gal aquarium adds Element ppm/degree Mg 2.66 S 3.51 dGH 0.61

I'm not sure how 2.66ppm of Mg relates to 0.61 dGH? My understanding is that 1 dgh = 17.8ppm.

2.66ppm of Mg should raise hardness only .15 degree. Even if the sulfur content is added the result would be very wrong too.

Any idea what's going on there?
You reversed a few numbers but otherwise you're correct. Made the changes and should update soon. Below is what it should look like.

dGH 1.1158
Mg 19.9286
S 26.2921
 
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