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The, uh, oh, let me turn the volume down. Okay, there. Okay. Uh, the best, best thing to do with a black tank is never empty it after only a couple of days. You got to let it get at least two thirds full, either by using it or by adding water to it to get, to get enough volume to flush things out. Now there is a YouTube video that I posted on the, uh, aim window that says that showed, uh, an experiment does the does ice in the black tank really work. And there, verdict was, nope, doesn't do a bit of good. Uh, now you're saying it does help, but, uh, it could be just the water you added with the ice did more of the heavy lifting on that as opposed to the ice itself. Uh, so, uh, my, my thought is you always use a good biological agent in the tank.