Test Results are in - who is the winner?

[tclproductions]

The yellowish areas, are they raised and rough? It kind of looks like scale and with your CH level it is certainly very likely.

Some are raised but some are not, definitely rough. Some areas are almost like little indents. What would the yellow color be?

So far no algae growth coming back - pool went from 45 FC to now 35FC in the past few days...slowly drifting down.

 

[tclproductions]

FC now 27 - still no algae growth !

So when I get to FC 10, I'll add a gallon of liquid once a week and see how that holds up. Is there any reason to shock every now and then, even if no algae is present?