Algae grows below, but not at lethal levels.
There were tons of frog egg masses...
...but now they're mostly tadpoles. There also are a few dragonfly nymphs, so they had better watch their backs.
The banana slugs have returned for the growing season. I've noticed significant damage on some of the lily seedlings, especially the Lilium rubescens for some reason. I've moved most of the liy pots onto overturned pots in the fountain. Since I live in Eureka, I can't check on them as much as I'd like.
It's not pretty, but what could be better than a moat?