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So, I got some fine black diamond abrasive sand. I’ve used the black diamond coal slag brand without issues in the past, but this time ,even after cleaning in a bucket and then in a pillow case, there a lot of green stuff mixed in. Like a lot. Does anyone know what this is? I’m assuming I’m going to have to scoop it out and replace it (yay!), but my concern is if it’s harmful? Do I need to replace all the water and toss my filter media? I’ve emailed the company as well to see if they have any answers. I spent all yesterday setting this tank up and for nothing. Anyway, any advice would be appreciated.
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