The box is approximately 4' long, 2' wide by 16" deep. The dimensions were chosen to make best use of 4' x 8' sheets of material and 8' lengths of spruce board. I've got the plans sketched out somewhere in the garage, I'll scan them and can email to anyone interested. The box is lined with scrap liner from my pond, neatly folded and streched over the edge of the box. I used a cheap chinese knock off pressure filter which seems to be doing a great job and is really quiet. The water flow is throttled back a bit because at full output the poor G.F. had too much current to deal with. The water lettuce has taken off in the last month to the point where I've been thinning it out almost every third or fourth day. A new red lily bloom is on it's way. Spring can't come soon enough!