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Thanks!

Now to figure out the energy cost to remove 3 cubes/day...

EDIT:

12W x 18h / cube = 216Wh/cube

216Wh/cube x 3 cube/day x 0.001kWh/Wh X 30days/month = 19.44kWh/month

What is the nitrogen content of a "cube"? (I know it has P and other stuff in it but I'm only interested in N right now for some rough calculation)

Background:
Recently setup a 125 US gal....

Ok, thank you!

What I meant was this:
http://img685.imageshack.us/img685/575/afslottop.png

Hello.
I am very glad to find this site! Very interesting to read.
Now I'm considering building an algae filter in a freshwater setup. Am studying your algae filter systems now.
But I have a...