So I am having an issue with my water. And am having issues finding any information on it as well. The water in my 30G tank had slowly turned brown,to the point where I couldn't see to the back of the tank. What I'm assuming to be detritus is overrunning the substrate,and I have to scrape the glass 2-3 times a week. I completely cleaned out my tank last Thursday. (100% water change, flushed my substrate as best I could) and it's already starting to brown out again. But is doing so at a substantially faster rate. Not sure if I should redrain and clean it again, but replace the substrate? Or if there's something I could do to treat my water . Any advice is greatly appreciated! Happy new year everyone!!