Also of note. If you are using beneficial’s such as Orca or Great White I would avoid using Hygrozyme. I was running into issues with the pH in my reservoir spiking along with the pH skyrocketing in my roots. I am pretty sure that it was an interaction between the Orca I use, and the Hyrgozyme.
I also noticed that after 2-3 days the water in my reservoir started getting murky. Once I stopped using Hygrozyme and going with SLF 100 my water has remained clear.
I think Hygrozyme is better suited for DWC such as the Grobo that can automatically adjust the pH. Not a good thing to have a product that is directly affecting the pH in your plants root zone. My runoff pH right before I discontinued using Hygrozyme was 7.2, the pH of the solution coming from my tank was 5.8, which was a pretty steep hike.
I actually had to flush my plant 3 times with Cal-Mag and low nute distilled water to get the runoff pH back to normal.