For feeding Romain, spinach, broccoli and other floaty foods use a veggie clip to hold the food against the side of your tank.
A little hint that might make green leafy veggies a little easier for your fish to eat:
cook the leaf in some tank water in the microwave for about 30 seconds, then make slits in the leaf parallel to the veins with a knife. Your fish will be able to tear off bites a lot easier than if you put the leaf in whole.
Here's a link that will show you what they look like.
http://www.bigalsonline.ca/catalog/product...1773&pcid1=2911