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Old 03-29-2005, 09:53 PM   #1
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Sealing DIY CO2 kit

What sort of sealant do folks use to seal the tubing into the bottlecap?

I'd hate to use something that would be toxic or detrimental to my setup.
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Old 03-29-2005, 11:35 PM   #2
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I used superglue. Silicone did not hold.
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Old 03-30-2005, 01:54 AM   #3
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I used sisicone inside and out. Let it dry overnight.
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Old 03-30-2005, 03:29 AM   #4
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Regular aquarium silicone.

Some here swear by using none at all, just drill the right size hole and force the tubing in.
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Old 03-30-2005, 04:04 AM   #5
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Mine is all press fit with no sealant at all.
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Old 03-30-2005, 07:47 AM   #6
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Just drill the hole smaller than you need, cut the tubing at an angle so it will go through the hole a little use a pliers and pull it through. When you need to "reseal" just pull some more through and cut off exess. Make sure you leave the seal in the cap though. Also use distilled water it will last a lot longer.
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Old 03-30-2005, 10:27 AM   #7
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I drill the hole slightly smaller, attach all tubing and airline, then use fun-tack (that yellow or blue re-usable poster adhesive) around the top of the cap where the rigid tubes are inserted. (that's for my gas separator, but would work on the main CO2 generator bottle too)
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Old 03-30-2005, 03:03 PM   #8
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I followed the DIY plan that included plastic bulkheads for "easy" swap-outs. Unfortunately, the tubing doesn't fit over very tightly, so CO2 is leaking out of the connection... *sigh*

Thanks for the quick replies...

Pressurized CO2 is looking better every day
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1 plattys; 6 Tetras (2 black skirt 2 serpae, 2 blueberry); 1 Pictus Cat; 1 clown loach;
2 mollies (1 spotted & 1 black); 1 Zebra Danio; 2 Oto; 1 golden wonder killie; 2 Kuhlii loach; 2 SAE; 1 bumblebee cat; 2 upsidedown cats; 2 golden algae eaters
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Old 03-30-2005, 05:55 PM   #9
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Try small zip tie (works for me with other aquarium plumbing). FYI with secure bond, holding cap and twisting bottle (per shawmutt's howto iirc) is still very easy.
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Old 03-30-2005, 11:42 PM   #10
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Hot glue does great on mine.
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