Maybe a carbon block filter like those found on RO sytems. They're used there to remove chlorine and, I believe, chloramine, before the RO membrane, certain types of which would be damaged by those compounds. Not sure what the maximum flow rate would be for effective removal, however. You'd have to test your product for chloramine to know when to replace your carbon filter. Not sure, either, if this would be cost-effective in comparison to the cost of using a commerical dechlorinator like Amquel or Prime.
3) Reservoir with airstone and heater. Water goes into the bucket on a timer, water heats up, air stone removes chlorine ONLY. A second pump adds the warm, dechlored water to the tank. Float switch recommended for safety.