Balancing for Plants and Fish, O2 and CO2 - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 05-22-2014, 09:14 PM Thread Starter
Algae Grower
 
Alphazygma's Avatar
 
PTrader: (0/0%)
Join Date: Mar 2014
Location: Mountain View, CA, United States
Posts: 82
Balancing for Plants and Fish, O2 and CO2

Hi everyone,

I've been adjusting my setup based on your fantastic feedback to other questions.

I've been advised the following:
  • Keep my lights on for about 6hrs a day, this to help reduce algae
  • Run my CO2 only while the lights are on.
  • Maintain some agitation to allow O2 gas exchange but keep CO2 while lights are on.
  • Run airstone at night, to improve O2 gas exchange since plants will now be consuming O2 and competing with the fish for it.

My setup is:
  • 7.5 GAL tank (Mr. Aqua Bowfront)
  • Pressurized CO2
  • Fish: 1 Betta, 1 Longfin Albino Bushynose pleco, 4 rasboras
  • Plants: A few little patches of Baby Dwarf Tears, 2 anubias, 5 branches of Ludwigia Repens, and trying to build a XMas moss wall

So far everything seems to be good, 0 Ammonia, 0 Nitrites, 5ppm Nitrates.

However the Ludwigia seems to not be doing so great, it is not the pretty red it was when I got it, it doesn't seem like dying, but it feels like it is struggling.


So, I have two questions:
A) Is there anything I could do to help the Ludwigia go back to that nice bright red.
B) During the day, with no artificial light on, are the plants photosynthesizing?


Thank you so much for being very helpful.
Alphazygma is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 05-23-2014, 02:34 AM
Planted Tank Guru
 
PTrader: (0/0%)
Join Date: Jan 2010
Location: Contra Costa CA
Posts: 11,721
It takes a certain amount of energy for the plants to photosynthesize. If the tank light is off and the tank is not near a window then there is probably not enough energy reaching the plant leaves for them to photosynthesize.

I would try increasing the time the light is on, perhaps going to 6.5 or 7 hour per day for a week and see what happens.

Hope you have a larger tank in the near future. Bristlenose Plecs need a much larger tank than yours.
Diana is offline  
post #3 of 9 (permalink) Old 05-23-2014, 07:07 AM Thread Starter
Algae Grower
 
Alphazygma's Avatar
 
PTrader: (0/0%)
Join Date: Mar 2014
Location: Mountain View, CA, United States
Posts: 82
Thanks for your reply Diana.
So, if there is not enough energy, then does that mean that the plants are virtually in Night Mode consuming O2 and producing CO2?


Sent from my iPhone using Tapatalk
Alphazygma is offline  
 
post #4 of 9 (permalink) Old 05-23-2014, 07:09 AM
Planted Tank Obsessed
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: East of knox
Posts: 435
I would have the co2 come on maybe 15 minutes or so before the light come on and have it shut off 15 minutes of so before lights out.
Stone454 is offline  
post #5 of 9 (permalink) Old 05-23-2014, 01:43 PM
Wannabe Guru
 
PTrader: (0/0%)
Join Date: Sep 2012
Location: las vegas
Posts: 1,195
Plants respond well with lengthy lighting hours, but that comes with a price too, algae. My tank gets indirect sunlight but I can tell they don't photosynthesize because the leaves folded once tank lights are off. I use to have my lights for 8 hours with good growth but had some algae. Now I have them on for 5 hours and ambience light thereafter, even BBA starts to go away. I've rather have slow growth, less algae and less trimming. You don't need airstone as long as there's surface agitation from your main filter.
HUNTER is offline  
post #6 of 9 (permalink) Old 05-23-2014, 06:11 PM
Planted Tank Obsessed
 
PTrader: (0/0%)
Join Date: Feb 2014
Location: Suriname
Posts: 492
First thing I'd suggest is get some Seachem Iron and see what happens after a few weeks. I started supplementing my micro ferts with iron and noticed that my Rotala's new leaves were much redder than they had previously been.
Tom Barr suggests promoting red colouring through limiting both light and NO3 but I haven't consciously tried that. However my Wisteria may be making that happen as I've read it is a hog on nitrate.
Steve002 is offline  
post #7 of 9 (permalink) Old 06-01-2014, 08:19 PM Thread Starter
Algae Grower
 
Alphazygma's Avatar
 
PTrader: (0/0%)
Join Date: Mar 2014
Location: Mountain View, CA, United States
Posts: 82
I was looking into the Seachem products, would you say use only Iron, or get the all rounded Flourish?

Thank you everyone for your awesome responses.
Alphazygma is offline  
post #8 of 9 (permalink) Old 06-03-2014, 08:08 PM
Planted Tank Obsessed
 
PTrader: (0/0%)
Join Date: Feb 2014
Location: Suriname
Posts: 492
I made the assumption you were already dosing ferts and the iron was just supplemental. If you are not dosing ferts now but are running with high light and CO2 your soon going to have some problems. Here are some threads to help with that.
http://www.barrreport.com/showthread...-for-Test-Kits
http://www.aquaticplantcentral.com/f...ing-guide.html
Steve002 is offline  
post #9 of 9 (permalink) Old 06-03-2014, 10:29 PM
Planted Tank Guru
 
Zorfox's Avatar
 
PTrader: (5/100%)
Join Date: Jun 2012
Location: Gainesville, FL
Posts: 2,105
I didn't see fertilizers listed. All the light and CO2 in the world won't help if plants are limited by nutrients. A nitrate of 5ppm is pretty low. Consider EI dosing with dry ferts. Leave the Seachem products for the rich. There is no need to pay money for water.

Here is dosing information for various sized tanks. Here is a primer to non-limiting nutrient dosing.

There are plenty of places online to purchase dry fertilizers. A member here, Nilocg, sales them as cheap as you'll find and has great support.
Zorfox is offline  
Reply

Tags
None

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