I cleaned my Tank totally the other day and yesterday I noticed it was kinda coudly and had some brown stuff along the top of the water. I didn't think anything of it because the tank was just 100% cleaned. New filter too ! So Today I noticed the cloudy ness was still there and there was like a thin layer of brown on the edges of the tank. so I did a 25 % water charge and I just thought I would take a look at the filter and it was COVERED in what looked like mudd ! I have NO CLUE what it is or where its from . What else should I do to the tank. The fish seem to be fine. The frogs may be a bit lighter but other then that it seems Okay . What should I test for and what should I do !? Id apprecite any help
Thanks Guys
Thanks Guys