here is another, a close up

here is another

Well I am by far no expert. But I do own one and have successfully kept it alive 6 months. First question, do you water it from rain water or distilled water? No tap right?

Does it get cold?

Lets start there and I hope someone else sees your post. Im afraid they think others have responded. I did because it looks like responses when you were really adding pictures. But pictures are Good at diagnosing.

These are OUTDOOR plants, not houseplants. Leave it outside. Keep in a shallow tray of rain or distilled water in full sun.

Also, again, I recommend removing it from that LFS- it looks packed and far too infested with algae. First step is to uproot it(gently) and see if there are any signs of healthy root growth.