Stopping Waterfall Leaks and Using Barley for Algae Control

Leak-Proof Waterfall Construction

Leaks in rock waterfalls usually happen at the liner-to-rock interface. Wrap the liner up behind the stone wall and backfill with soil to hold it tight. Use waterfall foam (expanding polyurethane) to seal gaps between rocks and direct water over the stones, not under them. Test with a hose before finalizing.

Barley Straw for Algae

Barley straw (or barley balls) releases compounds that inhibit algae as it decomposes. Place a bale in the filter or where water flows through it. It takes a few weeks to activate but lasts months. Pond peat in the filter does the same job and buffers pH.

Plant Power

Don't forget water lilies and floating plants. The more plant coverage, the less algae. Pick algae off oxygenators manually; fish will eat the rest.