Stress coat, Novaqua, Aqua Plus, it is all the same thing, just a different company makes it. You definately want to use Stress Coat as a tap water dechlorinator.
Whether it actually "reduces fish stress" as it claims to, eh, I dunno. I pretty much doubt it. What that aloe verra extract is suppose to do is mimic the natural mucus "slime" coat fish produce on their scales to protect the skin. When a fish is stressed, that "slime" can get rubbed off. You will notice that if you've ever tried to pick up a fish. At first, the fish is very slippery, but as you continuously handle it, your hands get greasy but it is easier to grasp the fish. When the slime gets rubbed off, it leaves the fish open to abbrasions and disease.
But stress is already known to reduce the immune system, and suppress immune function, and that also contributes more to the fish becomming ill after stress.
Unless they put a seditive in Stress Coat that we don't know about, I don't think it actually reduces stress the way it claims too. But it does dechlorinate tap water, so it is important to use that or a similar product during a water change.
~~Colesea