Sorry, ^iMp^...old habit from when I kept fish years ago that uprooted things. It always seemed that whatever they yanked up would float and jam up my intakes. With the weights attached to the plants, if something got pulled up, it stayed generally where I'd placed it, and I could shove its roots back into the gravel.
I did learn back then that the stores often sold things that were floating plants tied in weighted bundles and "planted". If I "planted" these, the bottoms would just rot below the gravel, and eventually the tops would free themselves and float like they should have been allowed to do in the first place. When they actually thrived floating around with no roots, I learned from my mistakes. Learning in reverse is not a good thing, but this was pre-computer days, the library was far from home, and the salespeople knew about as much as I did.
~KatieGatie