TJ, explain how the FHM spawn in the tires please? Do you let them float to some degree so they can spawn on the underside of the bottom sidewall of the tire and on the inside of the top side wall of the tire? Or should I fasten it to the bottom and let them just use the under side of the top lip of the tire when laying horizontal on the bottom?

I'm planning some kind of forage pond (very small and shallow) and it would be a lot easier to place the tires in my new forage pond and be able to more them around or experiment with them rather than chasing them around in my main pond.

And on the PVC, I assume you use like 1" PVC? Do you make bundles or just a single layer, and do they use the INSIDE of the PVC tubes of do they work better on a horizonatal layer or a cluster of PVC tubes all in a bundle?