"Dick" wrote in message
...

I dread losing the prime. I use a python and lower the water to a
safe level, then reverse the flow to refill the tank, then syphon
again and then the final refill. I estimate the total change at 20%.
I do this change twice weekly. I suppose the chlorine level differs
my one's local. My city water seems fine, the city adds minimum
chlorine.


So you add the dechlorinator to the tank like someone else said (or maybe
that was you)?

dwhite