I set up a 80 gallon tank three weeks ago and used fishless cycling. Last week I bought my first fish 3 Zebra Loachs, and 2 Yellow Labs (Labidochromis Caeruleus), all the fish seem to be fine and healthy but the two cichlids are flicking on the rocks and plants in my aquarium. They only do it for about 60 seconds maybe 3 or 4 times a day, they dont appear to have any white spots or strange markings on them at all. They are all eating and acting, what I would say was normal for a fish (their still a little nervous and like to hide in the cave at times). I don't have any live plants, I'm using a Fluval External Filter (I think its a 400) and the water is kept at a temperature of 26.5 Degrees Celcius. The Ph is around 7.8 and the water hardness is 3dh. I have been keeping a close eye on the amonnia and Nitrite levels and so far the ammonia is a little high (1.2) but I have been doing a regular water change (about 15-20% thee times this week) and the nitrite is below 0.3. Does anybody know why my two Cichlids might be flicking? the 3 Zebra Loachs appear to be fine and don't flick at all? 

