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Discussion Starter · #1 ·
How does one dose ferts for Tom Barr's Non Co2 method?
Half EI? 1/4 EI? 1/8 EI?

Do we still take into account the ppm levels ,like EI?(for ex.15 ppm N ,1 ppm Po4 ,10-20 ppm K?

Or do we simply observe for any deficit and then dose?

Quote"Diana Walstad does not suggest dosing, but adding 2-3 things once a week or two, certainly is not that tough???? the plants do gain a lot and then you can grow most any plant in a non CO2 tank."
 

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Depends on your light. For lower light, say medium or below, most dose only once per week. For me and my medium light lo tech tanks I go to the table for my recommended size and dose the same dosage size but just do it once right after my water change. Works for me.

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Discussion Starter · #4 ·
Depends on your light. For lower light, say medium or below, most dose only once per week. For me and my medium light lo tech tanks I go to the table for my recommended size and dose the same dosage size but just do it once right after my water change. Works for me.

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I have low light ,of course.high light and no CO2 would promote algae ,as far as I.ve read.
The thing is I have Seachem products (P and K) ,which I was dosing ,so far ,following the EI/low light method from the rota.la calculator.
Yet ,EI means an over abundance of nutrients ,and water change reset.So I was thinking to dose weekly (but 1/4 ,or 1/8 of EI Low light/weekly from the calc ,which is already a lowered concentration than Classic EI) - this would delay buildups ,am I right?
And when you say water change ,how often do you do it?
 

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Low light / tech EI = ~ 1/3 high light co2 dose. I start there and try to get down to ~ 1/4.

The frequency of dosing is the same. I start with ~50% WC per week in a new tank and then bring it down to 20% - 40% twice or once a month, based on how the tank is doing.

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I looked at what those who dose full EI use for daily dose, and simply add this much macro-micro once a week a day after water change.
How easy is that?
 

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I did 50% water changes weekly long before I put the first plant or fert in my tanks. I do it for the health of my fish. It also helps to get some CO2 into your tank.

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Discussion Starter · #8 ·
It also helps to get some CO2 into your tank.

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Isn't that the main purpose of Non Co2 method?To let the plants adapt to low CO2 levels ,rather than confusing them with different levels of Co2 when changing the water?
When I was changing water weekly ,I used to get BBA ,and my GH and KH would climb fast ,cause my tap water is hard - one of the other reasons why I decided to go the Non Co2 method.
My tap water has 20 ppm N ,but almost no phosphates.....it is why I started dosing some P and K ,and micros once in a while.
I still have some hesitation about changing water monthly ,so far ,the longest period between changes was 2 weeks interval.Now I intend to go for 3 weeks without WC ,then a month.Easy does it.
I figure ,if I have plants ,good circulation , acceptable levels of NO3 ,and no ammonia or nitrites ,water changes can wait,right?
Of course ,easier said than done .....I always changed water weekly ,it was my Sunday ritual.Really hard to break this routine.
 
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