Need input on my fert levels ! 450L & 110L (Estimative Index Dosing) - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 07-08-2016, 05:44 PM Thread Starter
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Question Need input on my fert levels ! 450L & 110L (Estimative Index Dosing)

Hi everyone, currently trying to tweak my fert dosing to fit my two tank needs.

Tank #1 - 500L (Pressurized CO2 at 30ppm, very high light)
Currently dosing daily E.I seven days a week, KNO3, KH2PO4, TNC Trace Mix & Easy-Carbo
Trace mix dosing has been cut back by 50%
Measured values, 5 days after 50% water change, been dosing E.I for a very long time. All tests are JBL drop check test.
KH - 6
GH - 5
NO3 - 25-30 ppm
K - 25-35 ppm
PO4 - 4,0 ppm
Fe - 1,5 ppm
Mg - 2,5


Tank #2 - 110L (Pressurized CO2 at 30ppm, medium light)
Currently dosing daily E.I seven days a week, KNO3, KH2PO4, TNC Trace Mix & Easy-Carbo
Trace mix has been cut back by 75%
Measured values, 5 days after 50% water change, been dosing E.I for a very long time. All tests are JBL drop check test.
KH - 5
GH - 2-3
NO3 - 30 ppm
K - 25 ppm
PO4 - 2,0 ppm
Fe - 0,6 ppm
Mg - 1,5 ppm

So what do you guys think, what could be improved?

Small tank
What I can see the Mg levels are on the low side.
In the 110L tank the GH is a bit to low for my liking as well and Fe levels are also a bit on the low side.
Add GH booster and increase the Micro dosing slightly?
Add Mg booster of some sort?

Large Tank
Here the Mg levels are also to low. Po4 maybe a bit on the high side and the Fe could probably be dialed back further?
Decrease Macro dose slightly and add GH booster or just Mg booster?
Decrease Micro dosing futher?

Whats the best way to increase the Mg levels ?

Cheers !


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post #2 of 2 (permalink) Old 07-08-2016, 09:31 PM
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Hi, Fissure.

I guess the question would be: are there problems currently in these tanks? Why the reduction of traces?

To increase Mg a small amount, MgSO4 is ok to use. Other options for Mg are MgCO3 which raise KH, MgCl2 which raises GH, CaMg(CO3) powder that raises Ca, Mg and KH. For me, MgSO4 is very easy to get. You might have difficulties getting the other ones.

To me, that amount of iron would slay my plants. But, it seems ok for most people. personally I don't believe anything more than 0.1ppm of iron would ever be needed.

I wouldn't be concerned with those PO4 numbers.
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