Maidenhair fern

[WaterWitchin]

Back in February, I asked on a FaceBook SH page if anyone had a maidenhair fern in SH. Decided to go for it. Had purchased two, same size. Both were putting out new growth.

So far, not impressed. Keeping them side by side, so same overall conditions. When one in SH's leaves started to shrivel and dry up, I tried using a heat mat for awhile. Didn't seem to help. I've grown African Violets in SH, which have basically the same super-fine roots. Really wanted this to work. It's not dead yet, but close to it. One on right is still in same plastic pot I purchased them in. It's putting out new fronds.

Any ideas how to make this work?