DY external reactor problem - DIY Aquarium Projects - Aquatic Plant Central

Go Back   Aquatic Plant Central > General Interest Forums > DIY Aquarium Projects

DIY Aquarium Projects For those that are handy or looking to save some money, discuss your DIY aquarium projects here.

Reply
 
LinkBack Thread Tools Display Modes
Old 11-01-2005, 10:37 AM   #1 (permalink)
Rub
Senior Member
 
Rub's Avatar
 
Join Date: Jul 2005
Location: Granada (Spain)
Posts: 144
iTrader Ratings: 1
iTrader Positive Rating: 100%
Rub is a regular member
Angry DY external reactor problem

Hi!!!, I have questions for you.
I made my DY external reactor (similar to Gomerīs DY reactor ) with PVC tube 10" x 2" (25cm x 5cm), bioballs and a difusser airstone ( is in the reactor). Water flow goes from top to the bottom (CO2 is inyected on top). I place my reactor on the input side of my external filter (eheim 2213).
The reactor works well, but the filter begins to do some noise and emits small bubbles (I think that is undisolved gas) in the evening (all is ok during the morning).
What do you thing?????

Greetins
Rub is offline   Reply With Quote

Advertisement [Remove Advertisement]
Old 11-01-2005, 11:10 AM   #2 (permalink)
Senior Member
 
Laith's Avatar
 
Join Date: Sep 2004
Location: Geneva, Switzerland
Posts: 2,307
iTrader Ratings: 0
Laith is a valuable member of the community Laith is a valuable member of the community
Default

I find it better to put an external reactor on the output side of the filter. That way only filtered water is going through it and any bubbles that come out will go into the aquarium and not the filter...
Laith is offline   Reply With Quote
Old 11-01-2005, 01:51 PM   #3 (permalink)
Rub
Senior Member
 
Rub's Avatar
 
Join Date: Jul 2005
Location: Granada (Spain)
Posts: 144
iTrader Ratings: 1
iTrader Positive Rating: 100%
Rub is a regular member
Default

Thank you for your answer Laith.
Quote:
I find it better to put an external reactor on the output side of the filter.
............why????????
I placed reactor on the input side because I thought that any bubbles would finish dissolving within of external filter..............
what is the best? high flow or low flow water whitin of reactor????

Greetings
Rub is offline   Reply With Quote
 
Old 11-02-2005, 03:00 AM   #4 (permalink)
 
Join Date: Oct 2005
Posts: 29
iTrader Ratings: 0
QuantumCranker is a regular member
Default

The eheims are "impeller in the top" type filters. Air bubbles always float to the highest point that they can. This is where the impeller is in Eheim filters. The noise you hear is likely the CO2 bubble building up in the impeller housing. This is called airlocking and can wear out the impeller pretty fast due to overheating. The only good canister filter for CO2 to go INTO is the magnum 220/350 floor models, not the H.O.T. Their impellers are in the bottom. I hope I helped a little.
QuantumCranker is offline   Reply With Quote
Old 11-02-2005, 04:36 PM   #5 (permalink)
 
Join Date: Apr 2005
Posts: 30
iTrader Ratings: 0
jonathan is a regular member
Default

I've never tried using an inline DIY reactor, but I'm planning to make one soon. I'm going to try adding a pre-filter to the intake of the filter/tube to reactor. Hopefully this will keep the big stuff out of the CO2 reactor.

http://www.thatpetplace.com/Products.../Itemdy00.aspx

I bought a few of these whe nthey were on sale for 5.49 for my red cherry shrimp tanks. They have a very fine media so it will catch the big stuff easily.

The only trouble I had with them is when I had bluegreen agale, the sponge seemed to be a magnet for it. I'm looking for a way around that. Maybe on a second try with CO2, I won't get bluegreen algae. I bleached the old sponges and they are still good as new. They seem to be made of decent material.
jonathan is offline   Reply With Quote
Old 11-08-2005, 07:45 PM   #6 (permalink)
 
Join Date: May 2005
Posts: 353
iTrader Ratings: 4
iTrader Positive Rating: 100%
czado is a regular member
Default

Assuming the filter has adequate mechanical filtration, inline reactor output side keeps debris out.
czado is offline   Reply With Quote
Old 11-10-2005, 05:56 AM   #7 (permalink)
Member
 
tazcrash69's Avatar
 
Join Date: Oct 2005
Location: Hawthorne NJ
Posts: 70
iTrader Ratings: 0
tazcrash69 is a regular member
Default

One other thing is that you want the CO2 to bubble up (counter-current) from the bottom of the reactor. This will give it enough time to dissolve before it makes a big bubble at the top of the diffuser. If you inject the CO2 from the top, you essentially made a really effective bell jar diffuser, and you might get splashing sounds when a big enough bubble is created.
tazcrash69 is offline   Reply With Quote
Old 11-10-2005, 07:55 AM   #8 (permalink)
 
Join Date: Apr 2004
Posts: 49
iTrader Ratings: 0
TPIRman is a regular member
Default

Rub: The noise is normal for an external reactor. It is annoying, but it is not a sign of a problem. Check out this thread:

https://www.aquaticplantcentral.com/f...=reactor+noise

Also, to dispel a couple myths in this thread: there's nothing inherently bad about putting a reactor on the input side. Debris is a problem in theory, but seems to be much less of a problem in practice.

One problem with putting the reactor on the output side is that it can reduce flow. Ghazanfar Ghori and I have both experienced this using an Eheim 2213. The location of your reactor should be decided based on your particular setup, but either side can work just fine.

Putting the reactor on the output side will not get rid of the noise.

The noise you hear is not CO2 building up in your filter. Also, CO2 bubbles are probably not going to hurt your Eheim. Eheims are designed to prevent airlocking, and many hobbyists inject the CO2 directly into their Eheims, using the filter as a makeshift reactor, without any trouble.

In short, don't worry. If you can't stand the noise, you might consider an internal reactor. As you'll see from the linked thread, I have tried to find a solution to the trickle noise on the external reactor and never figured anything out. Wish I could be of more help.
TPIRman is offline   Reply With Quote
Old 11-10-2005, 08:23 AM   #9 (permalink)
NE
 
Join Date: Dec 2004
Posts: 162
iTrader Ratings: 0
NE is a regular member
Default

There is a quite huge difference in the amount of gas that you could dissolve in the water if you have it under pressure or suction (i guess this is not the correct term but i hope you understand anyway).
I was not able to dissolve enough gas to meet my target without total gas build up in the reactor when i had it connected to the suction side, now when i have the exact same setup but on the pressure side, the maximum gas build up is about an inch.
I think There is some kind of physics law that correlates to this as well, I has been discussed in a Swedish forum as well.
NE is offline   Reply With Quote
Old 11-10-2005, 05:06 PM   #10 (permalink)
 
Join Date: Apr 2005
Posts: 30
iTrader Ratings: 0
jonathan is a regular member
Default

Yes there will definately be more CO2 dissolved if you put your reactor in the input side of the filter. Quick chemistry recollection -> for a chemcial reaction to take place there has to be collision of mollecules. Stiring, heating, and increasing pressure (added kinetic energy) speed up a reaction. A filter seems to be a good stirrer to me.

So has anyone used a prefilter and an inline reactor on the input side? I never tried this but I will when I get my CO2 equipment A prefilter will stop all the big junk from getting in. That seems to be the main knock on putting the CO2 on the input side.

For the other issue (CO2 in the filter) , just be sure your filter is bottom propelled and you'll have a great system.
jonathan is offline   Reply With Quote
Reply


Aquatic Plant Central > General Interest Forums > DIY Aquarium Projects > DY external reactor problem

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
Noisy External Co2 Reactor? RedDelPaPa Equipment 3 09-14-2005 06:48 PM
external pumps alexanderM Equipment 1 09-08-2005 05:46 PM
What are good External Reactors? Kevmo Equipment 5 03-17-2005 12:28 PM
Chiller and External Thermostat knightx Equipment 0 02-25-2005 11:19 AM
Wanted: External CO2 reactor and PH controller cpc1007 For Sale or Trade 2 01-26-2005 03:50 PM


All times are GMT -8. The time now is 10:00 PM.

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

Search Engine Friendly URLs by vBSEO 3.6.1