Are my discus okay?
Over the last two - three days most of my discus are spending a lot of time up at the top of the tank, heads up tail down. Not all of them but between 4-5 of the 6 I have. If I get up and walk over to the tank they will go back down to mid way and then come up again anywhere between 2-3 minutes and 2-3 hours. They are eating normally.
All my tests have returned normal readings
I am running an airline as per usual
The day before this started I did a fairly large overhaul of half my tank, moved the plants, the driftwood, added some different plants and yes, I did stir up some silt. The next day I did a 50% water change, this is normal, I change 50% twice a week. The one major difference in the tank is that there is a lot more open space than what there was i.e. they are getting more lighting.
The discus are the only fish in the tank doing this, everything else in the tank (harlequins, plecs, rummynose and sterbai are all acting perfectly normally.
What do you think?