Should diy co2 be completely airtight? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 10-09-2006, 01:37 AM Thread Starter
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Should diy co2 be completely airtight?

I am trying the "drill the hole smaller than the tubing technique". I tested it in the sink, only one small bubble comes out and that's when I'm putting all my weight on it...Is this acceptable or should it not leak at any pressure? Do I need to redo it?....

75 gal, Schultz aquatic soil substrate. Filstar XP2 and a H.O.T. Magnum canister filter, 20# Pressurized Co2, Coralife 4x65 watt pc lighting.

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post #2 of 5 (permalink) Old 10-09-2006, 02:00 AM
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Depends on your diffusion method... if it bubbles into a ladder or such, you should be okay, if there is a lot of backpressure (feeding into an inline reactor, or using some sort of airstone/limewood/glass diffuser you might need to get it completely tight.


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post #3 of 5 (permalink) Old 10-09-2006, 02:17 AM Thread Starter
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I just have it going into the filter inlet of my H.O.T. Magnum...No bubbles come out of the exhaust...I assume the co2 is being dissolved. I was thinking of doing the ol gravel vac tube reactor, but Hate having it in my tank.. Oh yeah the tube coming out of the bottles is run into a bubble counter then through a check valve and into the filter intake....

75 gal, Schultz aquatic soil substrate. Filstar XP2 and a H.O.T. Magnum canister filter, 20# Pressurized Co2, Coralife 4x65 watt pc lighting.

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post #4 of 5 (permalink) Old 10-10-2006, 09:39 AM Thread Starter
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Is three DIY bottles enough for a 55 gal tank? (I need pressurized, I know but DIY is the only option at the moment...)

75 gal, Schultz aquatic soil substrate. Filstar XP2 and a H.O.T. Magnum canister filter, 20# Pressurized Co2, Coralife 4x65 watt pc lighting.

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post #5 of 5 (permalink) Old 10-10-2006, 03:50 PM
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It depends, again, on many factors. The more light shines on your plants, the more CO2 will be needed. Many ppl say "you need" a certain amount in the water, I think elevated levels, even if they don't hit a particular mark, help your plants growing.

I used to do three 3l bottles on a 100gal tank, and it worked just fine. Medium light, no surface agitation, and 100% dissolving are important parts in making this work.

If your Magnum dissolves the CO2, great. No need for other reactors. Be careful not to shove the CO2 line too deep into the Magnum inlet, or it might collapse plastic bottles and suck the solution into your tank (won't happen with glass bottles of course).


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