I wanted to add a plant substrate to my tank. So I removed part of the gravel from the bottom where I want my plants to be and then wet my plant substrate which I believe is some type of soil, I then scooped some substrate up and started to lay it on the bottom and all of a sudden my whole tank is so extremely cloudy and muddy.. like so cloudy you can't even see my fish! So I've turned my filter off as I assumed this would only make it worse by keeping the soil particles moving around? Probably a really bad idea but I really don't know what to do! Can anyone tell me what to do? I know I've really messed up, I feel so stupid!!