help with my diy scrubber

[Lexxxx208]

Hello all im in the process of making my 2 sided waterfall scrubber I will be feeding 2 cubes of frozen a day what screen size will I need I will be using 3w red leds so how many leds aside will I need thanks in advance

[SantaMonica]

http://algaescrubber.net/forums/showthread.php?1419-New-sizing-guidelines&p=36277&viewfull=1#post36277