I am new to the pool world, just completed disassembling/washing my filter, reloaded fresh DE and the pressure was 20 psi. My pool store recommended we take the filter apart and wash it down with a filter cleaning spray, after letting the grids sit there for an hour they were washed down and loaded again. Pressure stayed at the same level (20 psi).
We ordered a new gauge, just trying to eliminate a faulty gauge reading, the new gauge read the same pressure (20psi)
My grids are slightly broken, not too bad according to my neighbor. They look old or worn out, yet none of them are broken.
I read here washing with dishwasher soap first, then soak in acid. Should I replace them? Can you think of any other reason why the pressure is so high?