The Planted Tank Forum - View Single Post - Cheap DIY liquid doser
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post #13 of (permalink) Old 03-03-2006, 06:25 PM Thread Starter
Algae Grower
Join Date: Mar 2006
Location: Fremont, CA
Posts: 15
Originally Posted by esarkipato
I've been thinking about this, and another advantage to the upper resevoir is re-filling: you wouldn't have to unscrew the near-airtight lower container.
If you put airline valves between the upper and lower containers, and a valve at the top of the upper container, you could add more liquid by closing the lower valves, opening the top valve and filling, then closing the top valve and opening the bottom valves again.
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