Hydroponic store dry ferts.. purchase or not? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 01-05-2016, 04:13 AM Thread Starter
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Hydroponic store dry ferts.. purchase or not?

stumbling across some very reasonably priced t5ho sunblaster bulb + ballasts @ my local hydroponics store, the store owner was informing me on a dry fert package for $50 .. came with 4 containers (trace elements/potassium sulfate/potassium nitrate/fully hydrated magnesium sulfate) roughly size of half a peanut butter container each

should i go with the purchase or is this just a upsale?
(picture is of the "recipe" that comes with the package specifically for aquariums)
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post #2 of 5 (permalink) Old 01-05-2016, 04:56 AM
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Compare the pricing and active ingredients to what you could buy here from nilocg or from Planted Aquarium Fertilizer - Home or other supplier.

You want separate packages so you can customize the dosing.

1) KNO3 is the most common supply of nitrogen and potassium. If your tank already has high nitrates from fish food then you probably won't use much of this.

2) KH2PO4 supplies phosphorus. It is dosed in too low an amount to count for potassium, though there is some in here. This was skipped in older fertilizer schemes like PPDD because they thought phosphates caused algae.

3) K2SO4 supplies potassium and sulfur. See 1). If you do not want to dose much KNO3, then you will use this to supply potassium.

4) Trace minerals: The most common product used is CSM+B. (Note- the Plantex name is old. The product is now called Nutritrace)
Plantex CSM + B is composed of 1.50% magnesium, 0.10% chelated Copper, 7.0% chelated iron, 2.0% manganese, 0.06% molybdenum, 0.40%
Zinc, 0.04% boron.
5) Some people add additional chelated iron.

6) GH booster. Sigh!

GH is both calcium and magnesium.
Plants use Ca and Mg in a ratio of about 4 parts Ca: 1 part Mg.
There is no sense in just adding magnesium unless you already know your tap water is low in magnesium and has enough calcium.
If the GH of your tap water is at least 3 German degrees of hardness, then there is probably enough. If you want to boost the amounts, then you could add a product like Seachem Equilibrium or Barr's GH booster to raise the GH by 1-2 degrees. Check with your fish. Soft water fish prefer low GH.

You certainly do not need to pay inflated prices for Epsom salt (the most common source of magnesium sulfate in such packages). Get it at the local dollar tree or 98 cent store if you really need it. Yes, there are some tap waters that are low in magnesium, but high in calcium. Not very many, though!
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post #3 of 5 (permalink) Old 01-08-2016, 12:04 AM Thread Starter
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Quote:
Originally Posted by Diana View Post
Compare the pricing and active ingredients to what you could buy here from nilocg or from Planted Aquarium Fertilizer - Home or other supplier.

You want separate packages so you can customize the dosing.

1) KNO3 is the most common supply of nitrogen and potassium. If your tank already has high nitrates from fish food then you probably won't use much of this.

2) KH2PO4 supplies phosphorus. It is dosed in too low an amount to count for potassium, though there is some in here. This was skipped in older fertilizer schemes like PPDD because they thought phosphates caused algae.

3) K2SO4 supplies potassium and sulfur. See 1). If you do not want to dose much KNO3, then you will use this to supply potassium.

4) Trace minerals: The most common product used is CSM+B. (Note- the Plantex name is old. The product is now called Nutritrace)
Plantex CSM + B is composed of 1.50% magnesium, 0.10% chelated Copper, 7.0% chelated iron, 2.0% manganese, 0.06% molybdenum, 0.40%
Zinc, 0.04% boron.
5) Some people add additional chelated iron.

6) GH booster. Sigh!

GH is both calcium and magnesium.
Plants use Ca and Mg in a ratio of about 4 parts Ca: 1 part Mg.
There is no sense in just adding magnesium unless you already know your tap water is low in magnesium and has enough calcium.
If the GH of your tap water is at least 3 German degrees of hardness, then there is probably enough. If you want to boost the amounts, then you could add a product like Seachem Equilibrium or Barr's GH booster to raise the GH by 1-2 degrees. Check with your fish. Soft water fish prefer low GH.

You certainly do not need to pay inflated prices for Epsom salt (the most common source of magnesium sulfate in such packages). Get it at the local dollar tree or 98 cent store if you really need it. Yes, there are some tap waters that are low in magnesium, but high in calcium. Not very many, though!
so first timer over here!
this is what i purchased today... trying to figure out formula for 1 liter bottles.
30gallon tank and wanting to dose 6days/week and water change on 7

this container of trace element contains Boron - 1.30% opposed to the 0.04% in the CSM+B thats a pretty big difference should i be concerned?
Aquarium Calculators | Estimative Index | DIY Aquarium Plant Food Calculator
im trying to use the aquarium calculator on this site and confused when it comes to the trace option... which would i choose to compare best to what i bought?

also going through the EI calculator its not showing how much potassium sulphate to add to macro solution.. or is it not needed?


still learning so a little help is appreciated
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post #4 of 5 (permalink) Old 01-08-2016, 01:18 AM
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The recommended dosage of potassium in EI is the same as NO3. Don't forget that some sources such as KNO3 already add some potassium as well as nitrate.

Generally trace element mixes are added using Fe (iron) as the proxy. So if the dose requires 0.2 ppm of Fe, you would target this with your trace mix, and let the concentrations of the other elements fall where they may. For some added safety, you could dose your trace mix at half or quarter this amount, then make up the Fe with another sole Fe source.

Feel free to edit.
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post #5 of 5 (permalink) Old 01-08-2016, 04:51 AM Thread Starter
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***keeping in mind im not going by the recipe as i first posted***.. trying to figure out best possible formula for my 30g

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