Amazon Sword appears to be rotting

[starsman20]

This was the first plant I ever bought.  It is about 2 years old.  It has thrived until very recently.  When I water change I will cut back the lower leaves and any leaf that shows holes etc.  They have always grown back fairly quickly. The tank is a 36 bowfront and at times it has reached the top of the water column.  I feed it with root tabs every month.  I have read they only live 2 to 3 years.  In the last 2 months the lower sections have started to turn clear and the leaves float off.  The roots themselves look pretty good I think.   Is there anything I can do to bring this plant back to it's former glory or do they really just die out after some period of time?

[Fish Folk]

I’ve never heard about lifespans of just a couple years. Root tabs plus Easy Green should stabilize unless something is eating it’s leaves. Could the roots be moved out past where you’re burying your tabs?

[starsman20]

Maybe. I just put in 2 more root tabs a few inches out.  I also added a cap of flourish advanced in case there is a phosphorous deficiency.

[Phantom240]

My sword is almost 8 years old, so whoever told you a couple of years is full of it. My plants all seem to get really unhappy when potassium bottoms out, so that might be worth looking into