I wanted some floating plants in my tank and was told that riccia makes a good floating plant. It arrived in a little cup, and I used a little bit to tie on a rock, and then tried to float the rest in the water. I soon realized the riccia kept migrating over to the filter (HOB), where it was getting pushed down and broken up and basically going everywhere in little pieces, sticking to everything (including the prefilter sponge). I tried bunching it back up a couple times and it would look good for a few minutes before it got involved with the filter again. I have the filter turned down to the lowest flow (which isn't very low. It's an AquaClear 20). So was this just a bad idea? Is there anything I can do to keep it together, but still allow it to float? If in fact it's just going to be too messy with my filter, does anyone have any other suggestion for good low-tech floating plant that won't make a big mess? I'm trying to get the tank ready for some celestial pearl danios that I hope to pick up this weekend. I've read that they like having floating plants for cover. Thanks!