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Using new membranes on a three post cdl unit. Everything ran great, processed close to 4000gal of sap this morning then boiled. I did check permeate with both a hydrometer and a Milwaukee...

Thanks all, new membranes on order.

Had a rush at end of last season and did not store my membranes in permeate or solution, just dry...my bad I know. I had done a thorough soap and acid wash and rinse at the end of the season then put...