Bubbles in your canister from CO2? - Equipment - Aquatic Plant Central

Go Back   Aquatic Plant Central > General Interest Forums > Equipment

Equipment Aquarium Equipment - Discuss equipment to help setup your planted aquarium.

Reply
 
LinkBack Thread Tools Display Modes
Old 03-23-2005, 06:27 AM   #1 (permalink)
Senior Member
 
Phil Edwards's Avatar
 
Join Date: Jan 2004
Location: Elysburg, PA
Posts: 2,173
iTrader Ratings: 2
iTrader Positive Rating: 100%
Phil Edwards is a regular member
Default Bubbles in your canister from CO2?

Hey folks,

I'm running an AquaMedic Reactor 1000 on an Eheim Pro II 2026 @ 2 bubbles/sec CO2. I've noticed that later in the day/photoperiod the filter starts blowing bubbles of gas from the return. I'm sure it's not CO2 or not much CO2 if there is some, because the amount of gas blown out is higher than the CO2 going in. Also, the bubbles aren't present at night or early on in the photoperiod suggesting that all the CO2 is getting diffused into solution. Have any of you experienced the same thing?

Thanks,
Phil
Phil Edwards is offline   Reply With Quote

Advertisement [Remove Advertisement]
Old 03-23-2005, 06:35 AM   #2 (permalink)
Senior Member
 
Join Date: May 2004
Location: Brooklyn, New York
Posts: 1,035
iTrader Ratings: 3
iTrader Positive Rating: 100%
pineapple is a regular member
Default

Although not the same as your set up, I have a similar experience with an Eheim 2224. CO2 is bubbled into the filter intake. In my circumstance, the reason is because later in the day the water is saturated with O2 as the plants have been pearling heavily since a little after lights on. Water taken into the filter is saturated in O2 and includes O2 bubbles from pearling plants. In the last hour before lights out, there is significant bubbling from the filter outflow as the oxygen is ejected. I try and adjust this by reducing the CO2 a little.

Andrew Cribb
pineapple is offline   Reply With Quote
Old 03-23-2005, 07:24 AM   #3 (permalink)
Senior Member
 
MiamiAG's Avatar
 
Join Date: Jan 2004
Location: Miami, FL
Posts: 3,956
iTrader Ratings: 5
iTrader Positive Rating: 100%
MiamiAG is a regular member
Default

I used to experience this as well. I'm not sure but I think when you bubble CO2, the bubble exchanges the CO2 for other gases present (e.g., N). You then end up with bubble accumulation that may be composed of N, O2, whatever. When this gets to a large enough size, the filter burps it out.

That's how I thought about it anyway.
MiamiAG is offline   Reply With Quote
 
Old 03-24-2005, 02:23 PM   #4 (permalink)
Senior Member
 
Phil Edwards's Avatar
 
Join Date: Jan 2004
Location: Elysburg, PA
Posts: 2,173
iTrader Ratings: 2
iTrader Positive Rating: 100%
Phil Edwards is a regular member
Default

Thanks guys.

I was thinking the same thing Art and wanted to see if other folks had the same thoughts. What a PITA that is going to be, healthy plants=ugly bubbles! That's a first.
Phil Edwards is offline   Reply With Quote
Old 03-24-2005, 04:33 PM   #5 (permalink)
 
Join Date: Apr 2004
Posts: 215
iTrader Ratings: 0
Jeff Kropp is a regular member
Default

Quote:
Originally Posted by Art_Giacosa
That's how I thought about it anyway.
My unfounded speculation was that my water became super gas saturated. Then when the impeller turned it created a low pressure area behind each blade and my water 'boiled' at room temperature.

However now that I have a separate reactor my cannister no longer belches or rattles. There is no way that my earlier speculation could be correct.

Phil, you will find that a separate reactor will eliminate your belching problem.
Jeff Kropp is offline   Reply With Quote
Old 03-25-2005, 05:27 AM   #6 (permalink)
Senior Member
 
Phil Edwards's Avatar
 
Join Date: Jan 2004
Location: Elysburg, PA
Posts: 2,173
iTrader Ratings: 2
iTrader Positive Rating: 100%
Phil Edwards is a regular member
Default

I was talking with Neil Frank, who's an air quality expert as well as being a highly experienced aquarist and he said confirmed what Art was saying. As CO2 bubbles diffuse in water they CO2 can be replaced by N2 and O2 and precipitate out of solution to form bubbles. It's highly likely in my estimation that these bubbles are getting trapped in my fine media and congregating until they get sucked through the impeller. Since I spent more money than I probably should have for that reactor I'm going to stick with it and just burp the canister first thing when I get home.

Jeff, that low pressure idea is a good one! I'll have to talk with my dynamics professor about that one. I wonder how much pressure there is in a canister already? Intriguing.

Best,
Phil
Phil Edwards is offline   Reply With Quote
Old 03-25-2005, 08:54 AM   #7 (permalink)
 
Join Date: Apr 2004
Posts: 215
iTrader Ratings: 0
Jeff Kropp is a regular member
Default

Phil,
Can you put the reactor on the return side? That might eliminate the problem in the cannister. Also consider that if your injection rate is set higher than your reactor's ability to dissolve gas it will burp out any excess.
Jeff Kropp is offline   Reply With Quote
Reply


Aquatic Plant Central > General Interest Forums > Equipment > Bubbles in your canister from CO2?

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Aquatic Plant Forum Replies Last Post
CO2 reactor pics niko DIY Aquarium Projects 10 05-26-2006 06:46 AM
CO2 into canister filter intake - any problems? JonF Equipment 14 03-02-2005 07:06 PM
max head for DIY CO2 titan97 DIY Aquarium Projects 2 02-25-2005 06:58 AM
Pondering pressurized CO2... glenhead Equipment 10 02-16-2005 05:00 PM


All times are GMT -8. The time now is 12:36 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

Search Engine Friendly URLs by vBSEO 3.6.1