Peter's Stem (micro)

Patwik

Junior Poster
Sep 9, 2016
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Hi guys,

I would like to ask if Peter's STEM (Micro) can be use as micro?
In my country, we import Trace for Planted tank so I am researching for some alternatives. I am concern about the heavy Sulfur and Copper.


GUARANTEED ANALYSIS
Sulfur (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.0%
13.0% Combined Sulfur (S)
Boron (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.35%
Copper (Cu) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3%
2.3% Water Soluble Copper (Cu)
Iron (Fe) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5%
7.5% Water Soluble Iron (Fe)
Manganese (Mn) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0%
8.0% Water Soluble Manganese (Mn)
Molybdenum (Mo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.04%
Zinc (Zn) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5%
4.5% Water Soluble Zinc (Zn)
Derived from: Magnesium Sulfate, Boric Acid, Copper Sulfate, Iron
Sulfate, Manganese Sulfate, Ammonium Molybdate, Zinc Sulfate
 

Allwissend

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Sulphur is not a problem, it is being added as SO4. Cu does seem a lot higher than need and iron looks low, especially considering no mention of chelators.

The question still remains if you can use it... Could you give more details about your tank? KH, substrate, pH, water changes, light, CO2, shrimps, etc
 

Patwik

Junior Poster
Sep 9, 2016
4
0
1
Hello Allwissen,

The question still remains if you can use it... Could you give more details about your tank? KH, substrate, pH, water changes, light, CO2, shrimps, etc

Water Parameters
KH: 6-8
pH: 7.2+
Water changes: 40-50% weekly
Light: Highlight (Chihiros, Twinstar) - will be used in various tanks with different light fixtures.
Co2: Pressurised, getting enough
Shrimps: Amano, RCS, Yellow, Orange (No delicates).
 

Allwissend

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It could work with daily dose as the micronutrients will have to precipitate. I would target Mn not iron with this particular product. Then add the rest of iron needed from another product, Easylife Ferro for example.

In addition, if you have some culls or pest snails, you can try testing the dosage on them. Clean water container with water from the aquarium, dose 1 dose and wait 24h, dose 7 doses at once and wait 24h, dose 14 doses at once and wait 24h. 14 doses is about the max conc.you will theoretically get with weekly 50% wc. In aquarium side effects are likely to be lower due to interaction with organics, plant and bacterial uptake etc...

Still not optimal and would look for a better mix. Proceed with care.
 

Patwik

Junior Poster
Sep 9, 2016
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1
I will try to test this product.

Thank you for answering this quickly.

Cheers!
 

burr740

Micros Spiller
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Feb 16, 2015
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Fe really needs to be in a chelated form to keep it from quickly precipitating and also binding with P and probably some other stuff, especially with a PH level above 7

At best you can assume it wont be available to the plants very long, at worst it's going to screw up other nutrients
 

Patwik

Junior Poster
Sep 9, 2016
4
0
1
Hi Burr,

There is a product in Aliexpress called MoonChem Chelated Trace;

Here is the breakdown;

Chelate: EDTA
Fe: 3.0%
Zn: 2.5%
Mn: 2.5%
B: 1%
Cu: 1.0%
Mo: 0.2%
> 10%

This can be use as trace? and Fe is separate like DTPA type? Or mixing EDTA and DTPA is not recommended?
 

burr740

Micros Spiller
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Feb 16, 2015
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Mixing chelates is fine. Not sure about the copper in the last one, seems kinda high but you could do a test run like Allwissend mentioned
 
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