Here's historical climate data for Lakeland, FL:
http://cirrus.dnr.state.sc.us/cgi-bin/sercc/cliMAIN.pl?fl4797
Summertime AVERAGE daily high temps are in the low 90s and AVERAGE daily low temps are in the low 70s. Due to the higher specific heat of water versus air, your tanks will likely not reach the daily high temps during the day and not drop as low as the daily low temps at night. The key is to watch out for heat waves when the temps get above 100 and don't drop below 80. Then you'll be looking for other means to cool your tanks, such as floating frozen 2 liter bottles of water inside them during hot days.
http://cirrus.dnr.state.sc.us/cgi-bin/sercc/cliMAIN.pl?fl4797
Summertime AVERAGE daily high temps are in the low 90s and AVERAGE daily low temps are in the low 70s. Due to the higher specific heat of water versus air, your tanks will likely not reach the daily high temps during the day and not drop as low as the daily low temps at night. The key is to watch out for heat waves when the temps get above 100 and don't drop below 80. Then you'll be looking for other means to cool your tanks, such as floating frozen 2 liter bottles of water inside them during hot days.
