Hi there everyone.
Well, I have an interesting issue. I've had this set up for about 7 months or so, so nothing has changed. I currently have one rosy barb, one powder blue gourami, an albino rainbow shark, red wag platy, three dalmatian mollies (two adults, one adolescent), and a recently added rubber nose pleco.
My rosy barb has always been a bit of a spazz, but mainly in that he'll just zip around the aquarium. But I noticed the other day, while the aquarium light was still off but it was light enough in the living room to see the fish (I don't have it set to turn on until like 11:30) that he was swimming incredibly funny. He looked almost like he was going into shock, he was swimming faster than normal, spinning sideways, and also swimming upside down, then he'd shoot up to the surface and come out of the water just a little bit, then shoot back down and go back to his weird spinning upside down swimming.
So I really had no idea what to do and I was on my way out, but when I came back a few hours later, he seemed to be doing normal.
So a few hours ago I realised my self-timer was on the fritz so I went out there to turn it off manually, looked at the fishies and all were doing well. As soon as I turned off the light, he went back to his crazy swimming. I waited a minute or two, turned the light back on, and he was fine. Turned it off, crazy swimming. What the heck?
I can't say for sure how long it's been going on, but I know he hasn't always done it, because I've sat there and stared at the fish tank many times before.
Any ideas? Suggestions? I just want to make sure my fishie isn't dying of some weird disease, or suddenly afraid of the dark.