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"even if it appears perfect?" Hmmmm.....what about "if it ain't broke, don't fix it?"If it still balances easily, is crystal clear, etc...then why change the water at all, unless you're preparing for a cold winter where there will be few opportunities to drain/fill?As I type, I've got the 2 garden hoses hooked up to the tub, draining it (sloowwwww)....I'm taking advantage of one of the few days left before everything freezes up....now it's rainy, melty, foggy....and should stay above freezing for a couple days. Perfect.
Great post Steve. The 1500 value is nice to know.