Ph adjustment

	Happy New Year everybody!!

		I just wanted to ask what (if any) negative effects might come to my
aquarium if I use
Hydrocloric Acid to lower the Ph of my water change water. I change about
10% of my 130g tank once
a week and lower the Ph in the tank using CO2. The Ph of my tap water is
about 8.0-8.2 . I tried just putting
the water in with out adjustment but the Ph fluctuates too much for my

					any comments welcome,