Ionizer or Salt system? Which is better?

Definitely salt. Take a moment to read this one. Welcome to TFP! :wave:

 
+1 Salt. Also +1 Welcome to TFP!

Even if you eschew salt, skip the ionizer. Pool builders are notorious for rarely being any good at water chemistry, in spite of their self-proclamations otherwise. Remember, the guy on the plant floor making a car is not an expert in oil refining, even if his handiwork will one day be full of and powered by the stuff.
 
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