I use Amquel & Novaqua plus together, to keep the water optimum. It's my understanding that Amquel aids in binding ammonia. I also add IAL extract which helps to bind ammonia and keep the water at blackwater condition. I've had a lot of success with using both, but Novaqua plus used alone is great too. StressCoat can also be used alone as a dechlorinator, and works very well... I just get annoyed because of all of the added stuff, and how it causes my tanks to get a film on the surface after a few days.

Honestly, I started off using them together because when I ordered my BettaTalk pair, Faith advised me to use it. It worked so well that I haven't changed since. I also buy the HUGE bottles (and I'm thinking of buying the powder form) so it is much less costly than buying small bottles of other, less reliable dechlors.