Thats very interesting. I also have a few schools of Rainbows; Red Irian, Boesemani, Praecox, Parkinsoni, Tourquoise. Yellow, Axelrod and Furcatas with a school of neons. I started out with 12 Furcatas and am now down to 6, and 6 neons, and I always blamed it on my lone Opaline Gourami in there. I never once suspected my larger rainbows as a possible culprit. I didn't think they eat swimmers, just frozen live.

Maybe it was a bit of both.......

Agreed with Rainbows being a great planted fish. I also like Geos as they help turn the substrate in between cleanings Great little vacuums