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Its the herpes of aquariums.... once you have it you ain't gettin' rid of it
Looks really nice if you can tie it to some small flat rocks, and then place them wherever, helps soften some harsh transitions from hardscape/plants. Should be simple enough to grow, but you'll have to "shake" it out from time to time as mulm and leaves etc will get trapped in the fine leaves of the riccia
Yep, very similar to mosses, but the riccia offers a new and exciting look, different from traditional moss, I might actually go pick some up now.... Thanks for getting that thought in my head
The Riccia may do the same, just tie it into a rock or whatever the same way as if you were planting a carpet. So small clumps of riccia every 1/4 inch or so covering the stone/hardscape.