Not sure of your purpose but if it's water treatment (dechlorinator) both Prime or Amquel+ are better choices. As for bio-boosters or enhancers, I wouldn't waste my money. Their claims are questionable. "T"
:iagree: I swear by Prime as a dechlorinator and it includes a slime coat booster (purpose of stress coat). As for any of the biological boosters (such as stress zyme) that are NOT refrigerated, there is really little to prove that they do much. Bio-Spira on the other hand, is a refrigerated bio-booster that has a very limited shelf life and is really the only one I know of that has reliable results.
It's not that StressCoat is bad. It's just that both Prime & Amquel+ are more comprehensive & economical in doing the same job & more for close to the same price. Chk. the labels of each bottle & compare. "T"