no image posted.
If they are sleeping right near the return (which my clowns have done) you might have electric issue with your return pump which is coming out of return right there. I would assume it would zap your whole tank but if all you clown have sleep in that one area I would be looking at the area to be the issue.
If they are sleeping right near the return (which my clowns have done) you might have electric issue with your return pump which is coming out of return right there. I would assume it would zap your whole tank but if all you clown have sleep in that one area I would be looking at the area to be the issue.