Sodium Hydroxide Concentration?

[Peace River]

I know there are several threads on R2R about using sodium hydroxide to adjust pH, kill Aiptasia, etc. What is the common concentration of sodium hydroxide that is used - 93%? 50%? 25%? etc.?

What is the best resource(s) or guide to using sodium hydroxide to impact pH in a reef system?

 

[Randy Holmes-Farley Verified Community Expert]

The recipe here matches my diy#1 so folks can use calculators online for dosing

https://www.reef2reef.com/threads/second-new-diy-two-part-recipe-with-higher-ph-boost.357080/

 

[Justdrew]

Duda Energy on Amazon. 99% Pure Food Grade.

Randy's recipe is based off 99% pure Sodium Hydroxide. I have been using this brand for over a year.