Hi all. I’m looking for some advice on what could be wrong with my guppy. I’ve noticed his tail seemed to have dropped and also changes colour but didn’t think much of it. I think he gets chased a fair bit by the other fish and I thought this was the reason for his tail changing colour due to stress. However this morning he’s been hanging out at the top and bottom of the tank not moving much and breathing faster than normal. Just now I came in to check on him and he was at the bottom spinning frantically in circles. Now he’s at the top near the back not moving as if he’s sleeping, still heavy breathing. The rest of the guppies are behaving normally. Is anyone able to shed light on what’s going on? Thank you in advance.