The Planted Tank Forum - View Single Post - Placement of Check Valves DIY CO2
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Old 11-16-2012, 02:46 AM   #4
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Originally Posted by Barbgirl View Post
I personally use check valves between every bottle including between both yeast bottles, yeast bottles and drop checker, drop checker and tank.

The reason I do is that I alternate bottles that I change; bottle #1 this week and #2 next week to keep a more steady flow of CO2. When changing the bottles I don't want to lose the pressure that had already built up (takes too freaking long) and the check valves prevent any loss.

In short: Check valves prevent pressure loss.

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+1 to this. This is how I ran mine before I went pressurized. This way your system continues to bubble instead of having to wait for the entire thing to get up to speed.
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