06-08-2012, 04:30 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.