Samps;540899; said:
I live in Lakeland, FL....
You know that obligates you to pitch in on the breeder business that is for sale
Samps;540899; said:
...Your tanks will be fine if your filtration is strong. Strong filtration will cool the water off to some degree. ...
NO NO NO NO that is NOT how it works.

Flow has nothing to do with cooling, only heat transfer. Do a search for Newtons Law of Cooling. It says nothing about filtration cooling a fish tank. The heat must go somewhere!!! Two bodies of different temperatures will exchange heat energy until they come to equilibrium. If the tank is 90F degrees and the garage is 90F degrees, no amount of filtration, pumping, or fans will ever cool the fish tank until heat energy is removed from the garage. Then at that, the specific heat of the water in accordance with Newtons Law of Cooling will dictate an exceptionally long cooling period.
Samps;540899; said:
...I have 5 tanks in my garage and even in 100F weather, my tanks don't exceed 82 degrees. I leave my heaters in all year around also. ...
Two things are happening.
1. Thermoclines and
2. Day and night temperature differential.
1.The air thermoclines in a garage because there is no circulation. The temperature along the ceiling can be around 110F degrees while the air at head level is 90F degrees and the air at your feet being 75F degrees. (I am picking arbitrary numbers but the principle is the same.) The average temperature that the tank and filter are at is what will dictate the temperature that the system will approach.
2. The day/night temperature differential is extremely important because water has such a high specific heat. The temperature change in a fish tank is very slow. The larger the body of water (vs. surface area) the slower the temperature change. During the day the tank will absorb heat energy. While you are asleep and the garage is cool, the tank is losing heat energy.
When you go out into the garage duing your waking hours and experience an instantanious 90F degree temperature, your tank is experiencing an average temperature of the past 24 hours.