Zebra mussels also take in everything, but some of the blue green algae, the zebra mussels don't want that, and they just pass it through.

When the water gets clearer than it used to be, then you can get a lot more algae growth.

I rose from marsh mud
algae, equisetum, willows,
sweet green, noisy
birds and frogs.

No water, no life. No blue, no green.

So excuse me forgetting, but these things I do/ You see I've forgotten, if they're green or they're blue/ Anyway, the thing is, what I really mean/ Yours are the sweetest eyes, I've ever seen.

There's no limit to how much you'll know, depending how far beyond zebra you go.