I have 10-12 swords in my two 100gals. From my experience, swords get most of their nutrients from their roots. Do you add any root tabs?
Despite what everyone says, swords do like lots of light. Strong light, not long light time. They can give in lower light, but with strong light, root food, they will really grow.
Despite what everyone says, swords do like lots of light. Strong light, not long light time. They can give in lower light, but with strong light, root food, they will really grow.