What is ppm? - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 09-01-2014, 06:55 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Sep 2014
Location: Norway
Posts: 19
What is ppm?

Hi,

I know that ppm = Parts per million, a common unit of measure.

But still I do not get how much I CO2 30 ppm is ...

I'm fighting some black brush algea and I've been recommended to use 30 ppm of CO2..

Thanks,

Johnny
sunrage is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 09-01-2014, 07:18 PM
Children Boogie
 
mistergreen's Avatar
 
PTrader: (13/100%)
Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
CO2 isn't an anti BBA agent. You need to kill it or remove it. CO2 is for healthy plants and healthy plants usually reign in algae.

As for the ppm question, you can use the drop checker to give you a visual indication if you have 30ppm. Most experienced plant keepers can just look at the plants and fish to guess how much CO2 they have.

ps. CO2 in air is measured in ppm by volume and in water it is measured in ppm by weight.
mistergreen is offline  
post #3 of 7 (permalink) Old 09-01-2014, 07:31 PM
Planted Tank Enthusiast
 
JoeRoun's Avatar
 
PTrader: (0/0%)
Join Date: Dec 2009
Location: Surprise, AZ
Posts: 634
Smile Parts Per Whatever is Convenient

ppm
JoeRoun is offline  
 
post #4 of 7 (permalink) Old 09-01-2014, 07:37 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Sep 2014
Location: Norway
Posts: 19
Thanks for the quick reply on both subjects. I thought that maybe that ppm was related to how many bubbles of CO2 pr min or something like that, but I'll get a drop checker.

As for the BBA, the easy fix for me is to remove it, but I would really love to know how to kill it.

Thanks.
sunrage is offline  
post #5 of 7 (permalink) Old 09-01-2014, 08:15 PM
Planted Tank Guru
 
PTrader: (0/0%)
Join Date: Jan 2010
Location: Contra Costa CA
Posts: 11,721
bubbles per minute are just a bubble count of how much CO2 your set up is offering to the water.
It is another question as to how much of those bubbles are actually getting dissolved into the water. That is where ppm comes in.
Diana is offline  
post #6 of 7 (permalink) Old 09-01-2014, 08:57 PM
Children Boogie
 
mistergreen's Avatar
 
PTrader: (13/100%)
Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
Yes, make sure you're dissolving the CO2 into the water. Some sort of diffusion device is used for that and ppm quantifies how many molecule of the stuff is in the water.

There are several methods to kill BBA
1. use Hydrogen Peroxide. Don't use more than 2ml/Gallon of it in the water. It can kill fish an plants.
2. use excel or something equivalent in Europe. It's the carbon supplement whose main ingredient is Glutaraldehyde. Double the dosage. In addition to being a supplement, it also is an excellent algaecide. Again, it could kill fish and plants if overused.

The BBA should turn red when it's dead.

Last edited by mistergreen; 09-01-2014 at 09:07 PM. Reason: +
mistergreen is offline  
post #7 of 7 (permalink) Old 09-01-2014, 10:17 PM
Planted Tank Enthusiast
 
JoeRoun's Avatar
 
PTrader: (0/0%)
Join Date: Dec 2009
Location: Surprise, AZ
Posts: 634
Red face Apologies

Quote:
Originally Posted by JoeRoun View Post
ppm
Apologies one and all, I misfired…

What the smart folks said…

Embarrassed,
Joe
JoeRoun is offline  
Reply

Tags
ppm

Quick Reply
Message:
Options

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

Password:


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

Email Address:
OR

Log-in










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