Yes, in fact, sodium thiosulfate is usually packaged as plain old dechlorinator. It also works on the chlorine (which is bound to ammonia) in chloraminated water, although it requires double the dose.
Thanks again Jim. My plan is to de-chlorinate the water in a 45G plastic drum right after a water change. I will have a small in-the-tank sponge filter that will run all week until the next water change. I think that ought to scavenge the ammonia.
Sounds a lot like my setup. I keep a heater in the tub (I do very large scale changes on my cichlid tanks) and have a submersible pump in there, too. I just snap my Python hose on after I drain the tanks and - voila - the aged water is on its way to the fish tanks.
I'm lazier than Jim - all my reservoirs are circulated by pumps, but the pumps are fitted with hoses sufficient to reach the target tank(s). I don't ever have to disconnect the Python or the pre-conditioned water hoses. Life is simpler, even if requires more pumps and reservoirs. The Python is used to refill the reservoirs after use.
I plan to be just as 'efficient'. I will be placing a plastic drum with lid for water storage right next to the fish tank. There will be a drain in the tank stand for vaccing. Doesn't get much more convenient than that.