I can't think of anything that I am doing differently but my swords quit getting tall. They looked stunted. I pulled them out and replaced them. The new plants have been in for two weeks and are doing the same thing. Good growth, just short stunted looking growth. I need any ideas you might have. I fert with root tabs and API Leaf Zone and Flourish

Close up photos of them are needed.

Also, what frets and how often are you adding them?

What lighting are you using, how long, and what sized tank?