This has worked for me a few times, it requires netting, so it is up to you. I hide the net between the water line and the glass top I have. Try not to let the net touch the water (turn it over so it wont), if that has happened full alert goes into affect, LOL. I then feed and wait for the perfect moment/angle and give 1 quick swipe down and to the front of the glass. If you miss---give up (from experience), try again the next day. It has worked a few times, but I also have removed rock and it was a heck of alot easier and faster. HTH some.