62 grams of Borax? please check my math

[salty joe]

I'm using a really nice spreadsheet I found on this forum for calculating home brew additives.

Spreadsheet says add 10g Borax to 1 L water. 1 ml of that solution will raise boron 0.374 micro grams in my 800 gallon system. So if I put the entire liter in, (10g of Borax) it would raise boron by 0.374 mg/L.


ATI says my boron is 1.89 mg/L but should be 4.21mg/L. So, I'm looking at about 62 grams of Borax to bring boron up to 4.21 mg/L.

Even if the math is right, does the dosage seem reasonable?

 

[Randy Holmes-Farley]

Borax is 11.3% boron by weight.

You are asking to raise boron by 2.3 mg/L or 7,025 mg/800 gallons.

Thus, you need 62 grams, as you calculated.

 

[salty joe]

Thanks a ton! I was worried about an OD. I'll space that 62 grams out over a few days.

 

[Randy Holmes-Farley]

Thanks a ton! I was worried about an OD. I'll space that 62 grams out over a few days.

Sounds good.

Happy Reefing!