Lighting and C02 - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 07-20-2010, 01:33 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Jul 2010
Location: Australia
Posts: 12
Lighting and C02

Hi, i have just purchaced a 600L tank (6ftx2ftx2ft) and have ordered 4x39w + 4x39 t5 lights for the tank is this suitable or overkill? will also be running pressurised c02 is it necesary to have a solenoid on the reg? also will i need more than one difuser running into the tank? also what sort of tubing do you use for the c02 line i have heard silicone is no good for co2?

any help would be greatly appreicated.
todd86 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 07-20-2010, 01:46 PM
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto
Posts: 11,882
Hoppy is probably the best person to answer the question regarding the lighting, but it seems to be quite a bit of light you have. However, you mention that you have pressurized CO2, so as long as you keep up with fertilizers (both macro and micronutrients), you should be able to have a relatively fast growing tank.

It is not necessary to have a solenoid on a regulator, but it does allow you to control your CO2 via a timer so that your CO2 can be turned off at night, when there is no need for the injection of CO2.

For a tank your size, I would not recommend a (single) diffuser, as you will likely not achieve sufficient CO2 dissolution into the water column. You will likely need 2 (or 3) diffusers, or better yet, you can use an inline reactor to achieve maximal CO2 dissolution. This can then be optimized by using powerheads to ensure that CO2 levels are uniform throughout the aquarium. This can also be monitored using a drop checker with a 4 dkH reference solution.

Finally, for the tubing, some people say not to use silicone tubing, while others say it is fine. I am with the latter, and use silicone tubing. Some people will quote numbers discussing the permeability of silicone tubing to CO2 gas versus other types of material, silicone being thousands of time more permeable, but the actual coefficient is still on the order of log-6 or so.

Anthony


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and
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  
post #3 of 4 (permalink) Old 07-20-2010, 05:16 PM
Wannabe Guru
 
yikesjason's Avatar
 
PTrader: (71/100%)
Join Date: Jul 2008
Location: Portland, OR
Posts: 1,600
The problem with silicon tubing is the tenancy to harden over time after exposure to co2. But it is not bad, just stay away from the vinyl tubing, because it will harden and crack a lot sooner. Depending on where you get your co2 system, you can probably get some "co2 tubing" at the same time.


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.
yikesjason is offline  
 
post #4 of 4 (permalink) Old 07-20-2010, 05:46 PM
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
A 4 tube T5HO light should be about 32 inches from the substrate in order to get high light, but not so high as to make controlling algae a continual nightmare. Don't just shut off half of those tubes, to reduce the intensity. The 24 inch front to back depth makes it very hard to uniformly light the substrate with two closely spaced bulbs. Raising the fixture takes care of that problem.

I used both silicone tubing and "CO2 resistant" tubing. The latter was very stiff, and hard to stretch over barbed fittings. The former was much more pleasant to work with. Both worked fine, otherwise.

If you use high light, as you seem to intend, a solenoid is essential. With high light you need to keep the CO2 concentration near the maximum the fish will live with in order to provide for the plants demand for it. But, that much CO2 at night, when the plants aren't using it, will drive up the concentration above that which the fish can live with. So, it is essential to shut the CO2 off at night. With lower light, the plants don't need as much CO2, so the overshoot at night isn't so bad. Maintaining a constant water surface ripple 24 hours a day helps keep a good supply of oxygen in the water, for the fishes benefit, and helps dissipate the CO2 at night when it is shut off.

Hoppy
Hoppy 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