saying goodbye to the "hail mary" of gas exchange - The Planted Tank Forum

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post #1 of 21 (permalink) Old 04-03-2013, 03:51 PM Thread Starter
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saying goodbye to the "hail mary" of gas exchange

So now I'm on the eve of introducing pressurized co2 to my tank via inline reactor.

I've read that co2 easily degasses. Up until now, I've had the filter output 1/2 out of the water, to ensure o2 exchange. But the more threads I read, the more I think I'm gonna wanna cut that out.

My main concern is ensuring sufficint o2 exchange for the fishies. Also, I'd like to create a situation at the surface to maintain somewhat stable rate of co2 degassing, thereby a stable level of dissolved co2 in the water.

How exactly does everybody have their cannister output set? Slightly raised to where it breaks the water surface, or submerged but causing waves? Can I depend on a heavily planted tank and minimal surface movement creating enough o2 for the livestock?
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post #2 of 21 (permalink) Old 04-03-2013, 05:17 PM
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i have mine set to create waves
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post #3 of 21 (permalink) Old 04-03-2013, 06:41 PM Thread Starter
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mild enough that you don't hear the breaking of the water surface?
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post #4 of 21 (permalink) Old 04-03-2013, 07:27 PM
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My output disturbs the water not at all. Plants do fine for oxygen exchange.
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post #5 of 21 (permalink) Old 04-03-2013, 07:30 PM
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^ Agreed, I have a 20 tall and a 10 running pressurized. Both without any surface disruption. I use a drop checker and it stays green, and the fish haven't noticed a difference. The most important thing will be to watch the livestock, if they are gasping at the surface then you need more O2 in the water
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post #6 of 21 (permalink) Old 04-03-2013, 08:06 PM Thread Starter
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sweet! thanks for the replies!!

what good news.
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post #7 of 21 (permalink) Old 04-03-2013, 09:17 PM
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sweet! thanks for the replies!!

what good news.
if ever oxygen becomes ur true concern
get a wet/dry filter

but be prepared to buy more co2. its cheap. a lot cheaper than fish if you go the high light, high co2 route
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post #8 of 21 (permalink) Old 04-03-2013, 09:47 PM Thread Starter
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i barely know what a wet/dry filter is - don't ya need a sump for that?

i think i'd just move the filter outlet back up to break the surface of the water, or add a bubbler, before i went THAT far down the rabbit hole!!

hahah. but who knows. the wife & kids are out of the house this friday night and I've got a major overhaul planned - not only am I hooking up the co2 via inline reactor, but i figured i'd throw in the UV light while I was at it. And I just now ordered an inline heater through amazon to go with it all!

I hope it all goes well, cause I quit drinkin a few months ago...
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post #9 of 21 (permalink) Old 04-03-2013, 09:49 PM
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I run a healthy ripple on mine, just almost splashing.
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post #10 of 21 (permalink) Old 04-03-2013, 10:22 PM
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In my experience, as long as there is some current and there isn't any film over the surface, your O2 will be ok. Even the slightest agitation seems to be enough.


"The fewer our wants, the nearer we resemble the gods." — Socrates

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post #11 of 21 (permalink) Old 04-03-2013, 10:51 PM
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I run a healthy ripple on mine, just almost splashing.
Ditto.
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post #12 of 21 (permalink) Old 04-04-2013, 01:18 AM
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I have it parallel to the water surface but close enough to the top that it makes ripples. Same with a Koralia Nano on the other side of my tank.
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post #13 of 21 (permalink) Old 04-04-2013, 01:32 AM
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My wet/dry outputs break the surface and makes two waterfalls in my 125g
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post #14 of 21 (permalink) Old 04-04-2013, 06:03 AM
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Originally Posted by WheeledGoat View Post
So now I'm on the eve of introducing pressurized co2 to my tank via inline reactor.

I've read that co2 easily degasses. Up until now, I've had the filter output 1/2 out of the water, to ensure o2 exchange. But the more threads I read, the more I think I'm gonna wanna cut that out.

My main concern is ensuring sufficint o2 exchange for the fishies. Also, I'd like to create a situation at the surface to maintain somewhat stable rate of co2 degassing, thereby a stable level of dissolved co2 in the water.

How exactly does everybody have their cannister output set? Slightly raised to where it breaks the water surface, or submerged but causing waves? Can I depend on a heavily planted tank and minimal surface movement creating enough o2 for the livestock?
I'm kind of at the same point you are right now with the introduction of co2. I got differing advice about o2 and surface turbulence. When I cut the bubbler down during the day as someone advised, I saw fish gasping. Now I have it running full on at night and about half on during the day. It seems to be working.

I would say to just watch your fish as you make this change. If you have to be away during the day, start your co2 at a low bps and check things when you get home. If your fishies are at the top seeking o2, provide some more for them or reduce your co2.

I'm as new at this as you are. I'm watching my fish for any distress. So far, so good. Good luck and let us know how it goes!

I threw in some duckweed as added security....
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post #15 of 21 (permalink) Old 04-04-2013, 01:03 PM Thread Starter
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I guess I could google it, but since I'm already here.... why is duckweed security?
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