Before I lost power yesterday,I made up a batch of new water fur a water change using Fritz pro ,at 1.026 / 76 degrees the ALK was 8.0 on Salifert kit ( thanks Kevin), pH was 8.0. So , was ready to do my usual water change yesterday, but we list power. Have generator running LED lights, main pump, Gfo, and heater - no skimmer or wave pumps. Stupid battery backup failed in 10 minutes on the MP40, my ups failed quickly as well as just keeps even when I have power from outlet going to it. So assume they both need to be replaces or new batteries installed at least.