Originally Posted by
Sabrina
Hello dvsrk,
Your temperature is not warm enough for discus, the better range is 84-86F. When you say your PH and Ammonia are in range, what are the exact readings? Also, please give Nitrite and Nitrate readings too.
I had discus that use to skim off the plants and ornaments in my tank, it was a water quality issue. Your water change size 90% might be too much, leaving no good beneficial bacteria in the water, as funny as that sounds.
I'm not an expert but i think you will find its your water quality that's causing that rubbing on the objects. I hope a more experienced member comes along soon to help