Hey just wondering if anyone has a picture of there roots from there swords? The way I have mine they kept getting pulled up! Tried putting stones on them now, but don't think its right.
More than likely a nutrient deficiency in that case, Echinodorus spp. are heavy nutrient feeders from experience, if I were you I'd be dosing a decent fertiliser such as TPN+, or you could make your own for a fraction of the price with dry ionic salts.