I would recommend calling your local Dept of Utilities to find out if there is chloramine in the water or not. I have a continuous drip system setup for my 180. Fortunately at the moment, my city does not put chloramine in the water, just chlorine. Simple is the best.
My setup is: cold water line > ball valve > whole house water filter w/ carbon filter to remove chlorine > reducer to 1/4" > 1/4" line > 1/4" ball valve > 1/4" line to tank.
It's cold water, but I adjusted my heaters to make up for it. They have to be adjusted season to season as the cold water is much colder in the winter, but they have no problems keeping up, 2 300w heaters in the sump.
My nitrates are @ 10ppm constant, which is good enough for me to not have to change water ever.