An EASY DIY money saving CO2 Injector - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 11 Old 12-30-2006, 10:28 PM
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I stopped using mine because of that reason. Never got a steady pressure and it ran out sooner than it should. I even ran 4 two liter bottles for a while and still couldn't get a descent rate for more than 2 days switching out two of them every week.

Something to try is wine yeast, supposed to produce better and lasts longer. Also, try either opaque or clear bottles and see if one works better for you. I had the green tinted ones and they didn't produce as well. The ones that were clear produced better. I have also heard from some that opaque bottles worked really well and even covering the bottle in black tape worked. Try it and see what works better for you.

Lowering your bottles may help also so the CO2 isn't flowing down then up above the level of the DIY bottles. I never did but some swear by it. Check valves are recommended for this so you don't get a nasty mess from backflow.

Silicone you tubing where it goes in the bottles, use the white plumbers tape for the threads and if you can find it, get the CO2 tubing as it is supposed to work better.
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