Crypt melt or thinning?

[Scaperoot]

     I've had these crypts growing in several tanks for about 6 months. In this particular tank, they've experienced sudden thinning. Up until a week ago, they were growing so well that you couldn't see any gaps. They thinned out, seemingly from one day to the next. I've included a second pic which shows the rest of the tank.
   The stem plants and terrestrial plants that are rooted in water are all still thriving. I dose easy green bi-weekly. The Hydrocotyle has taken over half the tank since I added a couple stems a few weeks ago. I'm wondering whether these crypts (sold to me as Indonesian brown) went through the root tabs and just need more. I had not added any for about three months. Will they recover? 

[lefty o]

my guess is they are being choked out for lack of light.

[Rube_Goldfish]

On 6/22/2024 at 8:55 AM, lefty o said:

my guess is they are being choked out for lack of light.

I know crypts are generally low light plants but I think you're right. But I also think root tabs wouldn't hurt, @Scaperoot. That's where I would start, anyway.

[Scaperoot]

On 6/22/2024 at 8:55 AM, lefty o said:

my guess is they are being choked out for lack of light.

I should have known. I trimmed the Hydrocotyle. Will the cryprs recover? 

[johnnyxxl]

The plants will recover just keep everything running right plants are slow for most things.  Any changes take weeks to be obvious for effective response to be visible.

[Rube_Goldfish]

In my still-limited experience, slower growing plants experience problems slower, too. Slow to grow, slow to die. With crypts, there's a good chance they'll bounce back.