@10 Tanks brings up a good question here. When I kayak, and I pass over beds of anacharis and hornwort, they are rooted clumps (hornwort is in great meadows). I find my anacharis here (Elodea sp) roots into very fine sand, though it doesn't in gravel. It has gradually become a rooted plant, like I see in summer lakes. I notice that in my very softwater town, hornwort is uncommon in stores, and I have none. It grew well in my hardwater house, a few houses back.
Not all the plants we leave floating are 'floaters' and it may effect how they interact with other plants. Floating, they're in "I got uprooted" mode.
When I'm kayaking, I see anacharis close to shore in shallows, and hornwort in deeper water of around a metre. So they coexist in nature, in different niches. it gets more interesting when we have true floating plants, from different habitats.
Not all the plants we leave floating are 'floaters' and it may effect how they interact with other plants. Floating, they're in "I got uprooted" mode.
When I'm kayaking, I see anacharis close to shore in shallows, and hornwort in deeper water of around a metre. So they coexist in nature, in different niches. it gets more interesting when we have true floating plants, from different habitats.