Fill a bucket up with tab water, hook up an air stone and pump to it, let it sit out and aerate for 24 hrs. This will evap the chlorine and you should be good. If your area uses supplemental fluoride in there water I'm not sure about how to get rid of that. But if its just some chlorine you should be good to go! Also after you mix your nutes let it sit for a minute.... some nutes have pH buffers in them that take a minute to balance out... after a minute or two then pH your solution correctly and water away!