I'm starting up a new 55g in a couple days and I ordered some floating water sprite and received much much more than I anticipated ,it COMPLETELY covers the surface,also received quite a bit of duckweed as hitchhikers. My question is can the surface being swamped like this cause oxygen issues or any other problems? I know fish love floating plants but this seems like too many, don't really want to throw any out. Not really worried about them blocking light out either as a have low light plants growing in substrate.