How long does Fe DPTA last in the tank? - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 10-09-2011, 09:34 PM Thread Starter
Wannabe Guru
 
VeeSe's Avatar
 
PTrader: (8/100%)
Join Date: Apr 2011
Location: Richmond, VA
Posts: 1,423
Send a message via AIM to VeeSe Send a message via MSN to VeeSe
How long does Fe DPTA last in the tank?

I have some iron that I got from GLA. I don't remember if it was EDTA or DPTA but their page today says 11% DPTA, so if they haven't changed it, then that's what it is. I've heard (don't remember from where) that this only lasts a few hours in the tank. If I dose this 12-15 hours before the lights come on (just after lights out), is it just useless?

-VeeSe

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
VeeSe is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 10-09-2011, 10:09 PM
Are these real?
 
Wasserpest's Avatar
 
PTrader: (192/100%)
Join Date: Jun 2003
Location: Monterey, CA
Posts: 15,609
You mean Iron DTPA, correct? It has a stronger bond than other chelators like gluconate and EDTA, so it should last longer. How long exactly is probably hard to tell, depends on pH and other things, but monitoring your plants should be sufficient. If they show iron deficiencies like Chlorosis, then you would need to increase either amount or frequency of fertilizing.


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.

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.

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.
Wasserpest is offline  
post #3 of 6 (permalink) Old 10-09-2011, 10:11 PM Thread Starter
Wannabe Guru
 
VeeSe's Avatar
 
PTrader: (8/100%)
Join Date: Apr 2011
Location: Richmond, VA
Posts: 1,423
Send a message via AIM to VeeSe Send a message via MSN to VeeSe
My lights turn on daily at 1PM and I'm at work for the whole day, so there's no way I can dose it shortly before lights go on. I haven't noticed chlorosis but I haven't exactly been looking out for it either. It sucks that I would have to change my lighting schedule in order to dose iron into the tank, as changing it to a 9AM-5PM schedule would effectively mean that I see my tank with the lights on for 0 minutes on 5 out of 7 days of the week.

-VeeSe

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
VeeSe is offline  
 
post #4 of 6 (permalink) Old 10-09-2011, 10:24 PM
Are these real?
 
Wasserpest's Avatar
 
PTrader: (192/100%)
Join Date: Jun 2003
Location: Monterey, CA
Posts: 15,609
Why do you feel it is important to dose iron just before lights on, or at a specific time of the day? Plants don't stop assimilating nutrients just because it is dark. I think you are overthinking this I doubt you will see big differences whether you add the ferts before, after or during the light period.


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.

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.

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.
Wasserpest is offline  
post #5 of 6 (permalink) Old 10-09-2011, 10:25 PM Thread Starter
Wannabe Guru
 
VeeSe's Avatar
 
PTrader: (8/100%)
Join Date: Apr 2011
Location: Richmond, VA
Posts: 1,423
Send a message via AIM to VeeSe Send a message via MSN to VeeSe
Quote:
Originally Posted by Wasserpest View Post
Why do you feel it is important to dose iron just before lights on, or at a specific time of the day? Plants don't stop assimilating nutrients just because it is dark. I think you are overthinking this I doubt you will see big differences whether you add the ferts before, after or during the light period.
Oh, I thought that they primarily uptake nutrients during photosynthesizing periods.

-VeeSe

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
VeeSe is offline  
post #6 of 6 (permalink) Old 10-09-2011, 10:36 PM
Planted Tank Guru
 
plantbrain's Avatar
 
PTrader: (267/100%)
Join Date: Dec 2003
Location: The swamp
Posts: 13,609
Without uptake, 2-3 days typically, but is dependent on the KH.




Regards,
Tom Barr
plantbrain 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