SlimFlem wrote:

The reason I've always hesitated to get a Python is because I don't want to
put tap water directly into the tank. Isn't that how it works? I prefer to
airate the water for a day and adding Prime to it. Do you just turn the
Python on and let it start filling from the sink and you just squirt some
water treatment in at the same time? how do you control the temperature?
if my 5 gallon bucket of water gets too cool, i just add a little water
heated on the stove and let it airate for 20 minutes more or so and then
pour it into the tank. what do you think of this system.

Years ago, when Chlorine was all that was added to tap water, letting water
aerate for a day was sufficient to get rid of it. Actually, much of it outgassed
when passing through the aerator on the faucet.

Today, most of us live in areas where they use Chloramines due to tighter health
regulations-that Chlorine didn't stay put very well, after all! Aerating your
water does nothing to remove Chloramines. But the Prime you add takes care of
them quite nicely.

Regarding Python, the simple answer is to add sufficient Prime for the entire
tank when performing the water change-this is what the instructions on the Prime
bottle say. So if you are changing 20 gallons in a 70 gallon tank, just add
sufficient Prime for 70 gallons. This may be slight overkill, but it is safe for
your fish.