No need. I just added my tank with new gravel and my tank is still slightly cloudy at the moment. That will settle with time.dprUsh83 said:I just added my new substrate (gravel) and now the tank is extremely cloudy. I rinsed and boiled all of my rock, cleaned it as best I could but it's very cloudy. Is this safe? Should I do a massive water change or should I wait? :?