Does Anyone Know Wots Up With My Plants?

[jameshiggins]

i have had these plants now any this has happened the only way i can describe it is it looks like they have been burnt. any help would be appriciated. i have now co2 system or anything and they are planted in sand

 

[frozenbarb]

Amazon sword going from emerged to submerged

 

[aaronnorth]

i think amazon swords lose some of their leaves when first put in the tank, but they will soon grow back due to changing to different water qualities, quite a lot of plants do this, just cut or pinch the bottom of the stem to remove dead/ dying leaves.