Here's the scenario:
Commercial outdoor pool - small maybe 30k. Pool and spa just renovated and converted to salt with controllers. Spa works fine.
Pool system produces lots of Hydrogen, resulting in -mV ORP and struggles to keep up with demand I assume because the hydrogen is reducing the chlorine.
I've seen this before, but have always found it to happen in low pH or high phosphate scenarios. This pool had high phospates but they have been removed and the pH is fine.
All other water chemistry parameters one would normally test are fine, and the spa right next to it with virtually the same water runs fine.
Any of you salt pros have a clue what else to look for that might cause increased hydrogen?