06-08-2012, 08:18 PM
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Originally Posted by Tigris
What kind of floating plants?
If there are no lower plants requiring light, then a fairly thick carpet of floating plants is fine, as they will significantly shade the light. I have had floating plants so thick the lower part of the tank is almost in darkness.
Water Sprite is ideal for this, it is fast growing and produces daughter plants rapidly. Something like duckweed is less useful as it will quickly multiply but it is very thin and light still gets through. Amazon Frogbit is another good one, though not easy to maintain for everyone, and similar there is dwarf water lettuce. Some of these are in our profiles, click the shaded names.
Some stem plants will grow well floating. The common Hornwort is a true floater. With enough of this, it will shade the tank. Brazilian Pennywort is one of my favourites as it grows very fast and thick. Green Cabomba is similar to Hornwort but a bit fussier.