co2 diffusion - ladder vs rio venturi pump - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 07-05-2010, 10:08 AM Thread Starter
Algae Grower
PTrader: (6/100%)
Join Date: Jul 2010
Location: Los Angeles
Posts: 130
co2 diffusion - ladder vs rio venturi pump

I have a pretty simple 15 gallon tall tank.
Plants: sword x1, java fern, cryptocoryne x1, and h. leucocephala.
Lights: 26 W CFL 6500K on for 12 hours/day
Fish: BN pleco x1, zebra danios x2, cory trilineatus x2, oto x2, SAE x2, guppies x10, platy x2, dwarf gourami x1, harlequin rasborasx4
Inverts: nerite snail x1

I am using a DIY yeast reactor and diffusing with an airstone. My KH is 6 and morning pH is 7.3, supposedly giving me a dissolved CO2 conc of about 11 ppm per KH/pH charts. I am looking for a better way to dissolve the CO2 and I can't decide between getting a nutrafin CO2 ladder or just getting the Rio RVT 800 pump, aiming it down, and feeding the co2 directly into the venturi inflow.

I've read all the Tom Barr internal and external reactor designs, but I'm not looking to build anything at this time. One of Tom's postings mentions that the impellers on the Rio RVT produce a nice mist, so I'm wondering if that would be sufficient without an attached reactor.

Also, the inflow on the Rio seems to be quite open. As I have some pretty small fish, I would be concerned about them getting sucked in. Any solutions?
superguppy is offline  
Sponsored Links
post #2 of 2 (permalink) Old 07-05-2010, 12:42 PM
Darkblade48's Avatar
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 11,630
I would use the Rio RVT 800 Pump over the Nutrafin Ladder. The latter takes up a lot of space, and is relatively inefficient.

For the inflow, you can try to use pantyhose or some other kind of netting; that should keep the smaller fish from getting sucked in.

Finally, using the kH/pH/CO2 relationship is a good way to determine your CO2 levels, but only if your aquarium water does not have any buffers in it other than carbonates, which is not usually the case in aquariums. As a result, you should use a drop checker with a 4 dkH reference solution to more accurately determine your CO2 levels.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is offline  


Quick Reply

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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

For the best viewing experience please update your browser to Google Chrome