Wierd Calculations

[325Pilot]

When I use some of the internet calculators, thy give me results that seem way out of line. I tried one I saw linked to on this forum, and it said that I could keep 55 inches of fish in my 25G deep tank. I tried another one that I also saw linked to which gave me thefollowing results; do their lighting specifications seem way out of line to you guys and gals?

Tropical Rectangular aquarium Length: 24 Inches Width: 12 Inches Depth: 21 Inches
Distance of light source from gravel: 21 Inches
Surface area: 288 Inches2 Volume: 26.18 US gallons Weight of water: 217.86 lbs
Max. units of fish: 24 Inches Heating required: 65.45 watts

Lighting requirements
Low light plants: 43.99 watts Low-medium light plants: 65.98 watts
Medium-bright light plants: 98.97 watts Bright light plants: 148.45 watts

 

[clutterydrawer]

that lighting looks too high and to my mind the heating seems too low the thing about calculators like that is cos they're "automatic" you can't jsut poiltely enquire as to what they're basing it on.