What are these?

[miamicuse]

I just had my pond cleaned out. Full of surprises - a lone surviving fish, two crabs, one toad, one flip flop under a rock.

At the bottom of the pond are two rectangular concrete tiles, with some plastic screwed onto them.

Any idea what these are?





Is it to anchor something to the bottom of a pond?

[gray cat]

Looks to be an anchor to me too.

[coolwon]

Submersible pump bases?

[danzcool]

someone macgivered a method of keeping something in place at the bottom, wherther it was a submersible light, pump or airstone, who knows since you don't have the other side of the clip

[two_wheeled]

Those appear to be light mounts. Underwater lights would clip in there.
Alternatively, they "kind of" look like go pro camera mounts, but not exactly. So I don't think that's what they are.

[two_wheeled]

I'll also say, I kinda like the ingenuity.