:;fg I want to know how many watts will a 80 gallon tank need.:;cr:;swls
Is it freshwater? If it's planted you would want at least 2 watts/gallon. That depends on the type of plants you have as well, 4 watts for plants that need high lighting. You also have to take into account the Kelvin rating of the bulbs. For a planted aquarium a range from 6,700K to 8,000K is ideal.
If you are talking about heaters, I would get a 300 watt. Some people use two heaters in case one fails for a larger tank. Not sure what watt if you get 2.
If you're talking about heaters than I agree with redlessi. For duals heaters I would go with 200's or 250's. I'm not sure how long a lesser wattage would last if one failed.
Hello Guppy. I would suggest 2 250 w heaters for an 80g tank. By having 2, one on each end of the tank will help to eliminate cold spots within the tank. Too, should one fail you have a spare already in place. Ken