Is my RBTA dying??????

I have my rbt for about a 1 1/2 month now, but the last 3 weeks it was hiding everytime when i turn the light on and at night when the lights are off it was walking all over the tank every night. The last week it doesn't take any food and the tentacles are not sticky.Tank is 8 months old.

Do i need to take it out???



Tank parameters are :



ammonia 0

nitrite 0

nitrate 10 ( was 20 the week before...had a nitrate spike)

ph 8.1

calcium 440

kh 10.5

magnesium 1305

sg 1.025