Thanks David, I will read that pdf it looks awesome.

Oliver,

I planned to use the blue barrels as a swirl filter to get solids in which I would sell and use on my other plants as fertilizer.

I used Google sketchup to create the design, it is a free download and fairly easy to learn.

I have a 1000 watt MH I was going to use over the 4 tanks and I plan to get a 400 watt flourescent light for the other area.

I intended to add more growbeds in the future, I am going to try and build a couple plywood tanks, either lined with pond liner or fiberglass or even roll on rubber (if it is not toxic).

The whole thing has to fit through a 32" door so I am forced to cut the IBC's in this way. I may change this design after reading the pdf.

I like idea of putting the pumps together using a header I will try that. This current drawing has two returns one to each of the fish tanks. I am not sure if this would be necessary.

Getting the fish out would be a problem. I may rethink this a bit.