BTA shrunk

[Ento83]

Hey i got 4 bta’s that were split from each other a while back and just about 2-3 days ago 3 of them stay closed and only open during night time. Uploaded pictures of all 4

 

[Ento83]

Pics

 

[Reef Breeders Verified Sponsor]

What are your light settings? The closed ones are also under the rock- perhaps they are getting too much light? Since they can move on their own, they will avoid light if it's too intense for them. Also, it's normal for nems to close up sometimes- typically they shrink down to expel waste. This can last a day or more.