Double-checking my setup

[lazord]

My ferns did the same thing. I just left them alone and they bounced back. Sometimes they're just adjusting.

[freshon]

Maybe try adding some root tabs near them? Even though they're not rooted, they can still grab nutrients from the water column if the substrate is enriched.

[bloomie]

I once put a Java Fern in my tank and it turned into a banana. True story.