Great suggestion, Tom!
However, if you have blue-green algae (ok, it's a cyanobacteria) in the house, it's easy to get the new tank contaminated. I've BGA growing here and there in my emergent swordplant pots. Any suggestions how to get rid of it?
Not all sags seem to do so well emersed: the dwarf sag (often sold as S. teres, though seemingly S. demersa) hasn't grown well emersed for me.
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