Interpret these results please! - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 02-19-2013, 07:26 PM Thread Starter
Wannabe Guru
Hobbes1911's Avatar
Join Date: Mar 2009
Location: Boston, MA
Posts: 1,610
Interpret these results please!

I just used a new nutrient calculator and want to switch my fertilization routine to EI. This was the readout for Pfertz micro (want to use up the bottle before going dry ferts):

To reach your target of 0.5 ppm Fe you will need to add 58 mL Pfertz Micros to your 63.0 L aquarium to yield Element ppm/degree B 0.05 Co 0.02 Cu 0.0005 Fe 0.50 Mn 0.06 Mo 0.01 Ni 0.0005 S 0.04 Zn 0.0041

Dose these levels 2-4 times a week for EI. Classic EI depends on good CO2, good circulation, and regular water changes. Light past moderation is not so important.
I'm interpreting this read-out as I'm supposed to dose 58ml of Pfertz micros every other day according to EI?

Or am I supposed to dose 58ml in total per weekly cycle and dose 1/3 of 58ml ~20ml every other day?

Hobbes1911 is offline  
Sponsored Links
post #2 of 4 (permalink) Old 02-19-2013, 08:28 PM
Planted Tank Guru
Zorfox's Avatar
Join Date: Jun 2012
Location: Gainesville, FL
Posts: 2,037
I interpret the 58ml dose as every other day. "Dose these levels 2-4 times a week for EI" There is a selection for daily which would be 23ml. I hope you have the dry ferts on the way since a full bottle will not even last 2 weeks using the EI method. I wouldn't even consider EI unless I used dry ferts. It's just too expensive and wasteful otherwise. Remember EI is NOT what the system needs, instead it's overdosing the system.
Zorfox is offline  
post #3 of 4 (permalink) Old 02-19-2013, 08:29 PM
Darkblade48's Avatar
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 10,643
If I were to interpret that as printed, it would mean dosing 58 mL per time (i.e. dosing three times a week would result in 174 mL).

I am not sure if the math is correct, but in general, commercial fertilizers are usually mostly water (very dilute), so large volumes do not surprise me that much.


A Primer to Pressurized CO2 and A Primer to Planted Tanks
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 online now  
post #4 of 4 (permalink) Old 02-19-2013, 08:37 PM
Planted Tank Guru
Zorfox's Avatar
Join Date: Jun 2012
Location: Gainesville, FL
Posts: 2,037
Originally Posted by Darkblade48 View Post
I am not sure if the math is correct...
It's correct. Unfortunatley, the calculations for premix trace ferts are based on FE only ignoring everything else. IMO these calculators should only be used for individual nutrients. Even the calculation for plantex CSM is calculated based on the amount of iron. Not accurate at all for trace elements other than FE.
Zorfox 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