I am contemplating auto dosing liquid carbon with a peristaltic pump, but the evil smell of the carbon tells me it is not sensible to leave it in an open container. So... Can a persistaltic pump be fed from a container that is sealed closed? I have not tried, but logic tells me that it will not work. Maybe there is a bottle design out there with some kind of one way valve\diaghram in it that that gets around this potential problem? Any ideas on what these would be called to help me search the web? For those curious... I tried autodosing with an allinone solution before, but the ph of my tank was too high and the ferts precipitated and gave me cloudy water. I now have two pumps sitting waiting for me to set up macro and micro solutions with, andam aiming to do this over the xmas break. I would like to also autodose carbon to assist keeping stable CO2 levels, thus helping to prevent inducing (more) BBA into my tank.