I'm moving to Houston this summer and I just finished breaking down my acrylic tank when I noticed that even though I scrubbed the tank pretty well (while trying not to scratch it), I still had some stains from algae and hard water deposits. I filled it back with clean water from the hose when I was trying to pressure it off, and I was wondering if there was something that would help clean it. Should I add vinegar to this water and let it sit for a day or so and then scrub again? If so at what concentration?