If you decide to build multiple waterfalls or rapids, the key trick is to narrow the stream so that the water has to rush over the stones.

If you leave the rapids wide, then you will lose the effect of the rushing water. The recommendation is to cut the width of the rapids (using rocks) by half. On smaller ponds, the average size of multiple drops or rapids is one to two feet wide. Narrower is faster.

Cascade Waterfalls

Cascades or multiple falls are simply one built on top of others. The process is the same, you merely use multiple courses of rocks to create the multiple drops.

And a last hint about foam - if you see it when you step back from the building process (a good thing to do regularly) you can set small bits of gravel into the wet foam (it takes about 30 minutes to dry) to conceal the foamy look.

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