I am currently have water problems with my 1G tank. I use a mixture of tap water, and Stress coat+ in it, but after a day, the water becomes cloudy, develops a thick skin of oil, and the pH drops significantly. The skin is very thick, it has slime coat in it, so I can't tell if its basic from the feel (though the pH says its very acidic), and also has no odor.
These problems only started happening after I started using stress coat+ in the water, so I'm guessing thats the problem. Before that, I was just filtered tap water.
I change the water in the tank 5 times a week now, but I'm getting tired of it. What is causing this problem?