Yes, if you dumped Methlylene Chloride directly into your tank their MAY be a problem When using to glue acrylic once it evaporated nothing is left. It simply melts the acrylic allowing a extremely strong joint. Methylene Chloride isn't the safest substance and you should not inhale it or allow it to get on your skin. Long term exposure has been linked to bladder cancer.
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-=Bryan=-
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