I'm concerned about my mbunas, they're all hanging around at the top and corners and not swimming about as much as normal.
I've had the tank set up and running for a month. When I moved it I reused all the substrate and both the canister and internal filters. I added a small airstone. There's lots of surface agitation even before the airstone.
They're not gasping or gulping at the surface at all and are eating perfectly well (mix of hikari cichlid excel, staple and repashy) They're all acting the same, I suppose the smaller ones, the two yellow labs and two ice white zebras are a bit more active. I'm just at a bit of a loss as to what's up with them.
Temp is holding steady at 26°c and the water parameters are good. No ammonia or nitrites. Nitrates are about 40.
Any idea what I can do to make them happier?
Oh, and there's no sign of any diseases, they all look perfect