CoSpy Posted June 17, 2021 Share Posted June 17, 2021 I'm using the tank and substrate my daughter had. She never had problems with water clarity, but since I set up the tank using the same substrate, Black Diamond Blasting Sand, the water is still foggy. It's been a month and the fish are doing well. I rinsed out the substrate well before using it. I've had aquarium shops test the water 3 different times and the results did not show any abnormal readings. I've used different water clarifiers that didn't change the foggy look. I drained and replaced 1/4 of the water last week. The only thing unconventional I'm using is the substrate of blasting sand that my daughter previously used without problems. I can't think of what to do next. I'm afraid to replace too much of the water for fear of killing the 11 tetras I have in the 55 gallon tank. Here is the information about using Black Diamond blasting sand: https://aquanswers.com/black-diamond-blasting-sand-aquarium-safety/#:~:text=Here’s why using Black Diamond blasting sand in,edges. It will not hurt your bottom-dwelling fish. Link to comment Share on other sites More sharing options...
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