I have had my Bristlenose for about 18 months now, and he is about 3" long. He always darts off to the back of the tank when you go near, but today he hasn't
.
He almost looks like he is hiccupping (body spasming every few seconds). Here is a video clip I just took of him:

What could be the matter with him?
Water peramaters are:
Ph 7.4
Ammonia 0ppm
Nitrites 0ppm
Nitrates 10ppm
Julia

He almost looks like he is hiccupping (body spasming every few seconds). Here is a video clip I just took of him:

What could be the matter with him?
Water peramaters are:
Ph 7.4
Ammonia 0ppm
Nitrites 0ppm
Nitrates 10ppm
Julia