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post #1 of 5 (permalink) Old 03-19-2005, 09:19 PM Thread Starter
 
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Ironman

I read a lot of things regarding iron,the dosing consentration is recomended at 0.1mg/L as I found out.The strange think is that my test kit and liquid fertilizer (sera's)recomend 1mg/L and when you add the recomended dosage the test kit shows around 1mg/L.Secondly I would like to know how reliable is to adjust your PMDD doses depending on Fe consentration,

Thanks
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post #2 of 5 (permalink) Old 03-20-2005, 05:21 AM
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I have made a number of comments going way back about the problems with using Fe as a proxy for testing traces.

I'd suggest tossing the test kit and not using it.
Rather, use the tank's volume and dose mls/tank volume/3x a week.

This is far more reliable and standard than any test kit.
It is the same dose in the USA as it is in Malta.

5mls 3x a week per 80 liter tank is a max rate of need.
Adding more will not improve plant growth/health at 1.5w/liter.

So you can add that much and then reduce it down till you have negative plant health.

You need to account for the other major players: light, CO2, PO4, NO3, K, GH and make sure these are non limiting before you do this.

Traces will have the least impact on the plant health, light, then CO2, then NO3 etc will have the most dramatic impact.

If excess Fe causes algae, why have for the last 1 5 years and more tanks than I can count have not had algae?
Same for PO4 etc.
They have had awesome growth and health with no algae.
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Tom Barr



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post #3 of 5 (permalink) Old 03-20-2005, 06:45 PM Thread Starter
 
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So if I take care for my macros,can I rely on a commercial liquid fertilizer for my micros,because i don't have access to the known dry powders you guys use.Also should I dose mgSo4 as a macro and mix it with the other macros in a fixed ratio or should I take it as a micro and dose it independantly?

Thanks for the information
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post #4 of 5 (permalink) Old 03-20-2005, 09:50 PM
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Macro dosing will give you much larger impact on growth and tank health than traces.

I'd suggest getting the macros in good shape them adding the traces.

If you are using Sera, dosing at 5mls per 80-100liters of tank with CO2 will be plenty 2-3x a week.

I doubt you need MgSO4 living there, it's mainly limestone and has plenty of Mg generally in the tap water.

I dose macros separate from traces.

If you can get Fleet enama, or H3PO4, KH2PO4, that will supply the PO4.
KNO3 is good for the K and NO3 needs.

www.gregwatson.com will ship to most places.
You do not need much and it's relatively cheap.
Might be worth it to you.

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Tom Barr



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post #5 of 5 (permalink) Old 03-21-2005, 09:45 AM Thread Starter
 
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I'm surprised that you know about the water over here and your right there are a lot of minerals in the tapwater,I just never thought of it before,that should cover mg.Conserning the macros I don't know if KNO3 would give enough K or should I mix with some K2SO4,because you didn't mention it as a macro previously.

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