Just saw the question asked about if Amquel will work and I did a little reading.... this is right from the manufacturers website. There seems to be an Amquel conditioner and an Amquel+ conditioner. The following is taken from their site comparing the two, these are all things that they have in common;
"AmQuel+ will remove over 30 ppm chlorine per dose (one teaspoon per 10 gallons of water), far beyond what any water supplier will use, which may be up to 3 ppm). Most chloramines contain less than 1.0 ppm ammonia. Both AmQuel and AmQuel+ remove all forms of ammonia that are natural in ponds and aquaria. At the dose of one teaspoon per 10 gallons of water AmQuel will remove one part per million ammonia, AmQuel+ will remove a greater amount, at least 1.2 ppm, and usually more than that. Both AmQuel and AmQuel+ remove some of the other nitrogenous organic compounds that are common in aquaria and ponds, with AmQuel+ removing a much greater amount per dose."
Either one it does seem to remove some ammonia. I would still keep up w/ pwc's.