Yes, as it says in my post, i did test the water levels. PH: 7.2-7.6, Ammonia: 0ppm, Nitrite: 0ppm, Nitrate: 0ppm.
I do not have an airstone in the tank. but he is not gasping. just laying on the bottom of the tank.
And again, as it says in my post, i use seachem prime water conditioner.