Planted Tank Obsessed
Join Date: Feb 2004
Location: The White Moutains of NH
I've got marsh marigold growing around my pond. No problems but then it's a naturally fed pond that almost always has water flowing in and out. It is a big plant. I would think that it would outgrow most tank situations. It may also need to go dormant like a lot of northern natives.
Protoanemonin is the poison in the ranaculus family.
The first spring greens are actually edible and it's only toxic if eaten in large quantities. Still not something I'd mess with though. Easier to grow spinach or pick dandelions.