The water in my spa keeps getting scummy - even though I've changed the water five times in the last few months. I've added a new Nature2 cartridge, cleaned the filters, and add the recommended amount of MPS to the water.
For several months, the water in my spa was just fine. Beginning a few months ago, nothing can keep the water clear and fresh.
Perhaps my ozonator has quit working? It's a CD type ozonator. How can one tell if it's working?
The spa is supposed to be a no-chlorine spa. Only Nature2 and MPS are supposed to be required.
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