Getting very angry w my DIY Co2.... - The Planted Tank Forum
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post #1 of 26 (permalink) Old 09-10-2007, 01:14 AM Thread Starter
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Getting very angry w my DIY Co2....

Ok I have my own DIY Co2 and on the cap I have a barb screwed into it and the silicone hosing to my tank fits right on the barb. For those of you that are unfamiliar with a barb it is just a simple plumbing fitting.
Anyways, I have siliconed this thing about 15 times. I have wiped it down with rubbing alcohol and I haven't, I've tried it all. I put big beads of silicone on it and around it and made a huge pile and I have done a nice bead along it inside and out. Nothing seems to hold, I wake up a week later and look and there is air or moisture bubbling out.
I have had it up to here >< with it and I was looking for some ideas.
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post #2 of 26 (permalink) Old 09-10-2007, 01:50 AM
Are these real?
 
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Silicone doesn't stick that great to most plastics. Try some other glue, like Liquid Nails, or some adhesive glue. Let it set well before you put it under pressure.


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post #3 of 26 (permalink) Old 09-10-2007, 01:51 AM Thread Starter
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I usually let it sit for 48 hours and I thought I needed to use aquarium safe silicone, because of the toxins in other stuff.
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post #4 of 26 (permalink) Old 09-10-2007, 01:54 AM
Are these real?
 
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Nah, that's just to keep the glass panes of your fish tank nice and tight together.

Once the smell is gone, glue is dry, pretty safe to use. Especially for your application, where it doesn't even get into contact with tank water.


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post #5 of 26 (permalink) Old 09-10-2007, 01:57 AM Thread Starter
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Alright then I will use my dad's industrial grade apoxy.....
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post #6 of 26 (permalink) Old 09-10-2007, 02:08 AM
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Generically speaking, one thing that will help things stick (besides cleaning the surfaces) is roughing them up. Sandpaper, or whatever.
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post #7 of 26 (permalink) Old 09-10-2007, 02:20 AM
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Why use silicone or glue? Just make a hole slightly smaller than the tubing and use pliers to pull the tubing through...It has worked for me and looks better than a blob of silicone....

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post #8 of 26 (permalink) Old 09-10-2007, 02:39 AM
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I used 150grit sandpaper when I did the DIY Co2. Then I seal it with Liquid Nail.
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post #9 of 26 (permalink) Old 09-10-2007, 04:41 AM
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Quote:
Originally Posted by dogg76 View Post
Why use silicone or glue? Just make a hole slightly smaller than the tubing and use pliers to pull the tubing through...It has worked for me and looks better than a blob of silicone....
Thats what I have always done and have never had a problem.

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post #10 of 26 (permalink) Old 09-10-2007, 12:34 PM
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Thats what I have always done and have never had a problem.
X3
For silicone tubing make it nice and snug, cut the tip at an angle, pull it through.

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post #11 of 26 (permalink) Old 09-10-2007, 12:43 PM
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Quote:
Originally Posted by tazcrash69 View Post
X3
For silicone tubing make it nice and snug, cut the tip at an angle, pull it through.
Exactly what I did and mine is running great.



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post #12 of 26 (permalink) Old 09-10-2007, 01:41 PM Thread Starter
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Ya well for you guys that didn't silicone your tubing into the cap, how much Co2 are you really getting in your tank? How many Bubbles per second or do you have a drop checker?
My statement is your DIY Co2 is probably not being as efficient as it could be with no airtight seal.
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post #13 of 26 (permalink) Old 09-10-2007, 01:46 PM
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Zack, Trust me, if it's done right it is an airtight seal. You hear the rush of gass when you unscrew it.
If the hole is smaller, when you pull it through the silicone tubing streaches, and gets thinner, then when it's relaxed, it expands back.

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post #14 of 26 (permalink) Old 09-10-2007, 02:23 PM
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I use gorilla glue and those tubbing connectors.

http://www.petsmart.com/product/inde...amily&keepsr=1

and then connect the airline to the connector. Works like a charm.


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post #15 of 26 (permalink) Old 09-10-2007, 03:17 PM
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Quote:
Originally Posted by zackish View Post
Ya well for you guys that didn't silicone your tubing into the cap, how much Co2 are you really getting in your tank? How many Bubbles per second or do you have a drop checker?
My statement is your DIY Co2 is probably not being as efficient as it could be with no airtight seal.
do this, screw a hole in the top of the cap smaller then the tube, pulll it threw the hole, screw on the top, blow as hard as you want. IT WILL NOT LEAK. there is no was diy co2 will produce half the pressure you just made with your mouth.

do this or buy pressurized co2, the epoxy, gorilla glue, barb in the top, method does nothing but break, and "make" youthink you have a better seal.


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