bucket in a bucket is a great set up.i have these spaced a lil far becouse i can...but they can also be packed in.2 gallon buckets.if i had it to do over...i'd get black buckets.makes it very easy to tranfer plants from one room to the next.and is available thru NGW (national garden wholsale catalog)as a complete plug and play set up...i have used the same bucket set up for my soil grows only the tubes were drain only instead of flood and drain.