Wpg

[radioman]

how do u determine wpg

 

[chr15_8]

if i remember correctly its

total watts of lights
divide by
us gallons

chris

 

[Matty P]

yep thats correct. So if your tank is 20 USG and your lights were 25W then you would have 1.25 WPG. Which is considered low-medium.

 

[radioman]

So if wpg is under 2 you dont have to have co2?

 

[Matty P]

lighting