Did you use water from your parents place to fill his tank? Did you acclimate him to it? Their water may be different from yours. You did not forget to add the water conditioner? Is your tank filtered/cycled, you may also want to test for ammonia, nitrite and nitrate, pH could be important too.
To keep stress low you could place a towel over his tank, it will help him stay calm. If he is hiding in his pineapple house, I would not disturb him, I imagine that this would only add to his stress.
I'm sure with a stretch of quiet time he will come around and be his old self again.
To keep stress low you could place a towel over his tank, it will help him stay calm. If he is hiding in his pineapple house, I would not disturb him, I imagine that this would only add to his stress.
I'm sure with a stretch of quiet time he will come around and be his old self again.