At the end of week 15 we introduced the tilapia to duckweed that we’d been growing for them in our cattail bog. (Cattail for us, duckweed for the tilapia, a nearby water source for the bees, goldfish to eat the inevitable mosquitos and a frog that happened by and apparently decided to stay.)
We triple washed the duckweed, hoping to reduce-to-near-elimination any unfavorable bacteria that may exist in the bog. We then offered the tilapia a small amount of duckweed, which is reportedly a tilapia fave. We plan to grow duckweed through the winter in the greenhouse, thereby reducing the amount of commercial feed we’ll need, and increasing the sustainability of this fish farm.
And look! I made a video of the event!