Well, there is this water change solution posted by Dennis Wong using a turkey basterView attachment 1048789
if I run the sucker over the grass it will start to float and makes a worse mess.
I need some video on proper cleaning carpet method
Water change to avoid algae
This may be the approach for your gentler/carpet plants especially if your current approach is sucking up the plants. And if you don't know Dennis he runs this site and is definitely an expert