Answer:
Hi Beth,
Stress coat and Stress Zyme both do different jobs so absolutely add both. Stress coat adds aloe vera to the water to protect the fishes slime coat (which all fish have)also if the fish are injured stress coat will help to heal their injuries. Plus it takes out all of the chlorine and heavy metals found in our water supply, so the water is ready for fish life.
Stress Zyme helps the water to cycle faster and while doing so keeps ammonia and nitrites in check so fish wont stress out and die. Stress Zyme also helps the biological bacteria in your canister filter to establish faster which is a very good thing. I have been using both for many many years with excellent results and I suggest you do as well.
Good luck with your aquarium...