yellow leaves

[Swampman]

Hi My Amazon Baby Sword gets yellow leaves. The tank has been up since the middle of December 2019. It hasSome neons, small rainbows and a few dwarf plecos. It is a 20 gal canister filter plus a hang on back,heater and a Fluval LED light. Tannins from driftwood. All the other plants are growing fantastic. The substrate is Ec-co.Fertilizers are Aquavitro Envy,Propel and Flourish Excel. I do not run co2. Could I have co2 problem? The sword was growing great until a week or so ago. Nothing different added in the tank. Here are a few pictures. Thanks

 

[Lokilow]

Its possible that its just dieback from being first put into the tank. Swords dont repair their leaves, so cut that yellow leaf off at the base and pay attention to the new growth.

Swords are the easiest to grow, needing low light and low ferts and no CO2 injection.