T&T: Fresh water Tank problem

[Rich Gano]

Every time we get on the topic of f/w system cleaning, I read the comment
about how fast chlorine dissipates from the tank water.  However, the vents
on my 120-gallon tanks consist of 1/4-inch copper tubing.  Does anybody
really think all the chlorine in a fresh fill of 120 gallons of city water
is going to get out of solution that fast, especially if the tank remains
full?

Rich Gano
CALYPSO (GB-42 #295)
Southport, FL