Not sure if you read my other posts in the filtration section. I had a tank crash due to power failure and my neglect. So when I redid the tank I wanted to try black sand. Big mistake!!! I don't know if I got a bad batch or what. It was nothing but cloudy for over a month. I thought it was a bacterial bloom. It only seemed to get worse. I could barely see my fish, although they were ok! The advice was to leave it alone. I tried. I got so disgusted I tore the tank down again. Put all rocks and livestock in a tote. I bought caribsea aragalive aragonite reef sand. What felt like a nightmare came together really well. Everyone's back in and things look wonderful!!! I'm so happy I changed out that Blacksand!!
Here's a before
And now today
The iPhone doesn't do it justice. But what a difference