My first ever planted tank, pH kH % Co2 questions - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 10-09-2012, 03:46 PM Thread Starter
Algae Grower
Join Date: Jul 2012
Location: columbia, SC
Posts: 133
My first ever planted tank, pH kH % Co2 questions

I have a 55 gallon tank with two aqua tech 30/60 hob filters. It's mediumly planted with some rocks, goldfish and ghost shrimp. Its been up and running almost 4 months. I just got some test kits, my pH is 7.5 and my kH is 4 so that means my Co2 is about 4.7ppm, right? Should I add Co2?
Action53 is offline  
Sponsored Links
post #2 of 6 (permalink) Old 10-10-2012, 01:39 AM
Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Posts: 10,524
Do not go by the charts that try to equate CO2 to some ratio between KH and pH.

If there was absolutely nothing else in the tank controlling the pH, just carbonates, then the charts would be OK. But that is never the case.

Usually the CO2 in a tank with reasonable water movement is not that high. The major source is the carbon dioxide that enters the tank from the air, and that is not much.
Diana is offline  
post #3 of 6 (permalink) Old 10-10-2012, 01:54 AM
Wannabe Guru
Higher Thinking's Avatar
Join Date: Mar 2011
Location: Oregon State Beavers!
Posts: 1,531
You could be close as the co2 concentration of a non supplemented tank can only match the atmospheric concentration, which is roughly 3ppm. However, the optimum levels are 25-30ppm. Tanks could ALWAYS use co2 supplementation. I second the notion that those charts can easily give false results.

Also, how are you keeping shrimp and goldfish together? Shrimp are tropical and goldfish are cooler temp fish.
Higher Thinking is online now  
post #4 of 6 (permalink) Old 10-10-2012, 03:49 AM Thread Starter
Algae Grower
Join Date: Jul 2012
Location: columbia, SC
Posts: 133
I just got the goldies to build up the bacteria and make sure my young kids didn't fill the tank with cookies and kill everything. I'd rather lose a few goldfish to cookiecide than some more expensive stuff. They're amazingly well behaved, they haven't touched the plants nor the shrimp and the shrimp are doing amazing. I plan on swapping the goldies out for some nicer fish in a few weeks, the man that runs the local fish store said he'll find them a nice tank at his shop when the time comes. I have some pictures in my profile.
Action53 is offline  
post #5 of 6 (permalink) Old 10-10-2012, 04:15 PM
Planted Tank Guru
PlantedRich's Avatar
Join Date: Jul 2010
Location: Pflugerville, Tx
Posts: 6,351
If it is working, it works. I tend to try things that many tell me won't work. Whether to add CO2 will depend on what you want from the tank. If you like simple and it is running okay, why bother? If you want more/better plants or growth, more CO2 is likely to be good.

A balance of things is needed. More light may require more CO2 requiring more ferts. At what level to stop? Personal decision.
PlantedRich is offline  
post #6 of 6 (permalink) Old 10-10-2012, 07:19 PM Thread Starter
Algae Grower
Join Date: Jul 2012
Location: columbia, SC
Posts: 133
I noticed my plants were growing great but they weren't very green, they were a pale green. I'll try some ferts first and after a few weeks add some Co2.
Action53 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:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

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