Myka,
The Tunze is a dedicated top off device while the Liter Meter is a dosing setup that could be used for ATO. If you can get the LM for close to the same money, I would think that would be the way to go as it can be used for so many other things if you needed it to be.
I hear great things about the quality of LM dosers.
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Mark...
290g Peninsula Display, 425g total volume. Setup Jan 2013.
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