First thing you gotta do is order a chlorine/chloramine test kit and be sure you actually have chlorine/chloramine in your water. They're $16 from here.
http://www.thefilterguys.biz/chloramine_filters.htm
If you have chlorine/chloramine in your water, you just filter it out with a carbon block filter. Or, you can buy some dosing pumps and dose prime into a tank of fresh water and another dosing pump to drip out of that tank of dosed water.
If not, you just buy a regulator and drip right into your tank, or into your sump. Then, you put a standpipe in your sump so if the water level gets too high, it'll overflow into a drain that goes out into your yard -- or your house's sump in your case.