Interpret these results please!
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Old 02-19-2013, 07:26 PM   #1
Hobbes1911
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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?

Thanks.
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Old 02-19-2013, 08:28 PM   #2
Zorfox
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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.
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Old 02-19-2013, 08:29 PM   #3
Darkblade48
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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.
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Old 02-19-2013, 08:37 PM   #4
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Quote:
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.
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