If you are useing fans to cool the water in your tank or have a chiller to do the same,hear is a way to get the most out of your fans and lower the water tem and allso the chiller will run less and save on ele power. Many fans are at the back of the canopy blowing in if you move the fans to the left and right sides of the canopy blowing in it will keep the air from short circuiting.It allso helps to keep co2 from going back in to the water.Used a 41/2 hole saw will make the job much better. Mont the fan guards on the outside and the fan on the inside of the canopy. RGibson



