film of something in water
I looked at my tank today and I had a film of something slimy on top of my water in tank that was so thick it formed bubbles in it when I dropped my fish food onto it and couldn't see threw it. I did like a 25% water change to it and it kinda cleared up abit. I am wondering what is it and what do I have to do to get rid of it? does it have to high of something in the tank? there are no live plants in the tank yet. I switched the substance to pool filter sand like 3 weeks ago incase you need to know. anything I can do to get rid of this stuff?