06-08-2012, 05:30 PM
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I would get a couple more of those large swords, Echinodorus bleherae. Three or even four for that sized tank. If you do, don't have them equidistant, but stagger the plants.
On the fertilizer question, a complete liquid is all-purpose, since you have floating plants and substrate-rooted. Seachem's Flourish Comprehensive Supplement or Brightwell Aquatics' FlorinMulti are both good; with either, make sure it is exactly the one named, as they make other products in these lines. It also wouldn't hurt to use substrate tabs for the large swords; not essential with the liquid, but it does make a difference. Seachem's Flourish Tabs, not sure if BA make a tablet but they may do.