gone three weeks and water still perfect?!?

[spa-ing]

We left over the holidays and were gone three straight weeks. The hot tub was left on, 102 degrees, and no one did a thing to it. Before we left I filled the bromine floater with 4 pellets and checked the levels (all fine). I might have shocked it but that's it. We returned and the water was perfect. All levels (including bromine NORMAL).  I am puzzled as to how this could be. Does it use less bromine when no one is in it? I was thinking we'd come home to a cloudy pool of goo, but it was crystal clear, good to go.  wild.

[Gary]

Clear water does not equate to good water, battery acid is very clear but I am not sitting in it.

Bromine tablets will typically bring the pH down and low pH can cause clear water.

[windsurfdog]

Bromine tablets will typically bring the pH down and low pH can cause clear water.

I'm not so sure about this statement but I agree with the spirit.  I believe clear water is more an indication of proper sanitization than just low pH...but I also think that Gary makes a very good point...check your water balance indicators and tell us what they say.  I agree with Gary that your pH is probably depressed somewhat...not a issue for soaking if your water is indeed sanitized but certainly an issue for your pumps and associated equipment.  Considering you were introducing bromine during the 3 weeks but not introducing contaminants, it is reasonable to believe that the water is clean but testing for bromine would be important.

spa-ing, after re-reading your post, if indeed all of your levels, including bromine, are normal, I'd say you are all set!

[spa-ing]

yes, all levels were fine, including pH. That's what I posted.

[tanstaafl2]

Does your tub have ozone and/or N2?

I use only dichlor and have shocked my tub and then left it for 17+ days with nothing else added other than O3 and N2 and it has done fine.

[Reese]

Does your tub have ozone and/or N2?

He's on bromine, so N2 wouldn't work.