Zorfox's Calculator and EI Dosing - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 07-26-2016, 08:43 PM Thread Starter
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Zorfox's Calculator and EI Dosing

Hi all,

I recently noticed that Zorfox's planted tank calculator has a dosing regime called "The Estimative Index" and one called "EI Daily". Does anyone who uses the calculator happen to know what the difference between the two is?

I'm using the calculator to make stock solutions. My tank is 32 gallons, dosing bottles are 900 mL and doses are 30 mL. Thanks!
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post #2 of 8 (permalink) Old 07-26-2016, 08:57 PM
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EI Daily is used to dose everyday.
EI is used to dose every other day.


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post #3 of 8 (permalink) Old 07-26-2016, 08:57 PM
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Estimative Index (EI) is usually done every other day, alternating between macros and micros. EI Daily is an attempt to cut Estimative Index to daily amounts -- you would dose both macros and micros daily, but be careful to dose them in different parts of the tank or delayed from each other so they don't interact adversely. Sometimes it's easier to track that way. Try running the numbers, you'll see that it results in roughly half the amounts.


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post #4 of 8 (permalink) Old 07-26-2016, 09:17 PM Thread Starter
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Thanks for the replies.

I've been alternating macros and micros with no dosing on my water change day, so I've been following "The Estimative Index" regime within the calculator. My confusion is because although my macros and micros are alternated, I'm still dosing something into my tank daily. I was always under the impression that dosing both on the same day was inadvisable because you would end up with something precipitating out of solution. I'll continue as is alternating macros and micros and using "The Estimative Index" regime in his drop-down dosing menu.
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post #5 of 8 (permalink) Old 07-26-2016, 09:46 PM
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Quote:
Originally Posted by GrantF View Post
Thanks for the replies.

I've been alternating macros and micros with no dosing on my water change day, so I've been following "The Estimative Index" regime within the calculator. My confusion is because although my macros and micros are alternated, I'm still dosing something into my tank daily. I was always under the impression that dosing both on the same day was inadvisable because you would end up with something precipitating out of solution. I'll continue as is alternating macros and micros and using "The Estimative Index" regime in his drop-down dosing menu.
Unless you are trying to make a very concentrated solution precipitation is not normally an issue. The small amounts of nutrients that we add to the tank is not enough to cause these issues under normal conditions.
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post #6 of 8 (permalink) Old 07-26-2016, 10:59 PM
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Unless you are trying to make a very concentrated solution precipitation is not normally an issue. The small amounts of nutrients that we add to the tank is not enough to cause these issues under normal conditions.
That being said, while true, i have induced iron deficiencies by dry dosing Iron and phosphate at exactly the same time and location, it did however take several weeks of doing this for the deficiency appear


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post #7 of 8 (permalink) Old 07-26-2016, 11:01 PM
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That being said, while true, i have induced iron deficiencies by dry dosing Iron and phosphate at exactly the same time and location, it did however take several weeks of doing this for the deficiency appear
Which form of iron were you using? What is the ph of your tank?
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post #8 of 8 (permalink) Old 07-27-2016, 04:54 AM
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I believe it is 10% dtpa and ph of 7.8 ish... And when say dosed together, I mean I measured out by weight the iron, then zero the scale and added the kh2po4 on top, then dumped into the tank.

It took probably 6-8 weeks of weekly dosing to develop some nice chlorosis on my anubias, at which point I did a large water change and realized I not only should I not dose then directly together, but that i probably didn't need to dose iron anyways because I realized I'd just been adding it to the tank because I thought it was needed without observing any real need for it to be supplemented


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