Some say you dont have to dechlorinate but i disagree 100% ....if i was you I would simply buy the filter for 30bucks and optimize what your giving to the plant. No reason to invest so much time and energy just to allow trashy water to fuck up your harvest. But to each his own, i still strongly suggest either allowing it to dechlorinate by sitting for 24hrs in the sun or using an air stone or the water filter for 30$