Brown around the edges...

[alivenwell82]

The melon sword and amazon sword in my 10 gallon are showing browning around the edges of some, not all, leaves. Others have curled and are a deep brown. One or two of these leaves were like this when i bought the plants. My nitrate level is between 0-5, which concerns me because the plants might not be getting enought nutrients. Is it my lighting, the nitrate? Ammonia is 0-.25 ppm, nitrites 0. ph-7.8

I'd appreciate any help.

 

[krap101]

i doubt its your lighting since i have less than 1 wpg in my 29 gallon tank and mines growing pretty well. id just pluck off the bad leaves.