During the warm season, water will flow from inside the greenhouse and down the waterway next to the greenhouse. This ponds acts like a reflector giving us extra sunlight inside the greenhouse. The waterway will eventually be packed with aquatic plants, mussels and minnows. Black locust keyhole bridges give better access.
Next, the water flows down the waterfall to the right of the stairs and then under the locust foot bridge.
The water finally ends up in the lower pond. A float valve is hidden inside the fork of the keyhole bridge and automatically gravity feeds water from the upper reservoir when the water level drops. The green algae floating in the pond is filamentous algae, a favorite food of tilapia.
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