Combined Chorine after Tropical Storm

I have recently added an IC40 SWG to my pool. Everything has gone great and outside of having to constantly having to manage pH due to the amount of aeration the pool gets from the infinity edge, the chemistry has been relatively easy to maintain. Combined chlorine has never been present in the pool until today. I tested the pool today with my Taylor Test Kit and received the following results
Chlorine 16 (I supplemented prior to the tropical storm to compensate if we lost power, (we...

Combined Chorine after Tropical Storm