I built a simple rdwc setup,I used a 400 gph pump, 1/2" and 1 1/2" clear tubeing a 42 quart cooler for my res and 4 square kitty litter buckets,you will have to put in a ball valve to control the flow,you run the 1/2" tubeing from the pump to the first bucket and 1 1/2" tubeing out to the next bucket and so on,I insulated the buckets with silver back insulation,if you got the money those 5 gal team coolers are the way to go(thats what I have now)you use rubber gromets for the fittings that go into the buckets to seal the tubeing,I have mine set up in a square,a frozen gal. jug of water in the res. every other day to keep my temp between 60 to 70 deg.I cant get the picture thing to work so I tryed to explain it the best I could,it really isnt that hard to do you will have to set the proper flow with the ball valve and with a few extra fittings you can make a drain setup that uses the pump to speed things up,do a little reading and you will find some pics to get some ideas,but I highly recomend useing the 5 gal team water coolers the pump creates heat and will warm your res. over time so you need to keep things as cool as possible cooler water holds more oxygen than warm water and less chance of root problems good luck