Sorry .. don't think I have any more picts of the setup ..
Setup if very simple ..
fill the bucket with sand, then poke 2 holes about 2-3in above the sand level ..
Attached the pipes to the bucket and then a pump to circulate the water from the tank to the bucket ..
Use about 15-1800ltr/hr pump as flow rate is also very important ..
Thats it .. I threw a couple of unwanted crabs into the sandbed to eat up any rubbish that got sucked in ..