Planted Tank Guru
Join Date: Jul 2010
Location: Pflugerville, Tx
The trouble with most charts is that they are simple answers.
Heating can't be a simple answer as it has a lot of variables. How much additional heat is needed depends on how the tank is set up. Cold room, hot room? Lots of air circulation around the tank? LED lights or or really hot lights? How much heat comes from powerheads and filters? How much cooling do you get through evaporation?
These are all things that will change the answer so most charts are not very worthwhile.
If you want a simple answer, go for the chart. If you want a correct answer, you have to do some thinking and know your tank.