I had my tank water checked yesterday before I did a PWC and (sorry I didn't write down the numbers, but...) there was a little Ammonia, no Nitrite, but a little Nitrate. I'm beginning to think it's gotta be the bottled water. This is definitely getting interesting. Also, I noticed that the info for the Arrowhead water may be wrong because they changed the info. It's now listed as:
[FONT=verdana, arial, helvetica, sans serif]Water Analysis
*(Mg/l=milligrams per liter)
*(PP/l=pints per liter)
Bicarbonates: 17-190 PPM
Calcium Ion: ND-52 PPM
Fluoride: ND-1.4 PPM
Magnesium: 1.3-19 PPM
Potassium: 0.69-3.6 PPM
Sulfates: 0.71-26 PPM
Sodium: 2.6-16 PPM
Total Dissolved Solids: 28-250 Mg/l *(except TDS which are parts per million)
Other Principal Components: Nitrate 0. PPM
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Anyway, I think I used the bottled water for the last time and I'll be dechlorinating my tap water by letting it sit out for a day before using it.