Hi all, So this is probably a very silly question but I was watching my fish today and to me it seems my fish are and always swim at a low level. I have two circulators on one side of the tank and one at the other end (pictures below). # 1. Are my fish annoyed because these fans too strong for them? #2. If I don’t have them on will there be enough oxygen for them? I have two large sponge filters and I also have a wet/dry sump in my basement right below the tank. I have no idea if this matters when it comes to oxygen! Lol I really have no clue.