Thanks jacthiele. Corrosive due to the calcium and pH being on the low side.
For cleaning the grid, or cell blades, do you see signs of white calcium build up? With corrosive water, or lower pH levels, you usually do not see calcium on the cell blades.
However, it is located in the manual. one part muriatic acid added to 4 parts water in a container tall enough to submerge the cell blades. ALWAYS ADD ACID TO WATER AND NOT THE OTHER WAY AROUND.