Step 6Put pails into hole (modify pails first)
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Before I start with this instruction I must tell you an important step. These pails have 12 holes drilled into each of them. These holes are half inch (1/2") wide and are interdispersed four drilled at the 3" mark, four at the 6" mark and four at the 8" mark. When you put the pails into the hole and backfill with 1" river rock the river rock cannot fall into the pails through the hole, however the water can seep into the hole to create a reservoir. The last thing you want to do is run a pump with no water. This ensures that won't happen. One of the pails that will house the pump has a notch near the top so that the electrical cable and pump hose can travel towards the top of the waterfall. All lids in place, all pails in the holes, now onto the next step.