Screen height

What would be the minimum recommended screen height?

This is what SM recommends: Each cube of frozen food you feed per day needs 12 square inches of screen, with a light on both sides totalling 12 watts. Thus a nano that is fed one cube a day would need a screen 3 X 4 inches with a 6 watt bulb on each side. A larger tank that is fed 10 cubes a day would need a screen 10 X 12 inches with 60 watts of light on each side. see info here. Use this link for the info you need: viewtopic.php?f=2&t=1582&p=13742&hilit=screen+size#p13742 .

Hi, i understand the area, but I was more asking what do people think is the minimum practical screen height? Eg I'd imagine a 1" high screen wouldn't be too practical but what is? 4", 6", 8"?

I see what you are asking. I try to base my width on my pump flow, then figure how much I want to feed (height) and make sure I have enough area (width x height) to suite my needs of the tank. Normally I like to have a minimum of 6" in height (seeing this is practical for my type of build preference), but long enough to just touch the water level to reduce noise and bubbles.