04-12-2012, 03:34 PM
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To answer the question in both last two posts, if it is Ceratopteris cornuta, it is best floating; it will grow planted in the substrate, but I have had poor results, perhaps due to the light being lower down there plus the increased difficulty of assimilating CO2 from water; on the surface it spreads fast. If it is one of the other sometimes-seen species (these are mentioned in our profile of Water Sprite) it does best planted in the substrate. I have not had these other species, so can't say from experience how they do floating, but I would try it by simply detaching a couple of the adventitious plants (the daughter plants that form on the leaves) and letting them float. Let us know how this works.
Yes, I now take photos of my tanks at set up and then periodically, it can be remarkable. Here is my 115g as reset July 31/2011 (bit cloudy, this was taken the day after I set it up), then 2+ months later in early Oct, then today with about 1/3 of the chain swords gone after a thinning 2 weeks ago.