What company????
Cause the one that we use for my job, use a gel for roaches and a green/red block for rats.
I haven't seen them use the spray in years.
Get a big enough plastic bag to fit over the tank.
Get an old fashioned air pump or 2 and enough tubing to get the pump far enough away from the house outside to keep only fresh air from entering the pump intake. Plug in the pump. put the tubing in the tank and seal the bottom of the bag. Make sure the bag stays pressurized. Open all of the windows and keep the fresh air flowing.
Turn your skimmer off unless you can get the air-intake to an area with fresh air. Turn lights off and cover the tank with plastic but leave a large enough bubble under the plastic so there is some air and keep the surface of the tank agitated.