Help With Plants

[clos]

ok so i have had plants for about two weeks i have 3 swords 2 java ferns and a couple red plants who the names escape me but one is likr a lilly plant the lillys are growing really fast i have a bio carb system but me swords seem to be turning yellow and brown the one closest to the c02 system seem fine but the ones further are yellowing and im noticing a brown scum build up on the walls

 

[aaronnorth]

Well it sounds as though CO2 isnt being distributed throuout the tank properly. Make sure the CO2 bubbles are in the flow, so they are blasted around the tank.