dry ferts vs. liquid ferts - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 12-05-2007, 12:34 AM Thread Starter
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Question dry ferts vs. liquid ferts

Does anyone out there have a preference of dry dosing ferts vs. the liquid dosing that Seachem offers? I still have a bunch of liquids left and I need to know if the amounts would still be the same for dry as it would for liquid?

ie: 1/4Tsp-KN03 3x a week
1/16Tsp-KH2P04 3x aweek
1/16Tsp-K2S04 3x a week
5ml or 1/16Tsp-Trace 3x a week
1-2ml-Fe/Iron 3x a week

I definately don't want to overdose anything, so any advice would be very appreciated. Thanks from a newby.....
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post #2 of 11 (permalink) Old 12-05-2007, 01:06 AM
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No, I don't think it would be the same. Think of the stuff Seachem makes as a certain amount of dry fert dissolved in the amount of water that fits in the bottle. I would use the guidelines on the bottle to avoid any calculations.

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post #3 of 11 (permalink) Old 12-05-2007, 01:37 AM
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It wont be the same. Seachem is mixed to dose a specific ppm per ml

You could mix your own dry ferts to dose X amount of ppm per 10 gallons if you wanted


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post #4 of 11 (permalink) Old 12-05-2007, 01:54 AM
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Big tanks....dry ferts
small tanks...liquids suffice.
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post #5 of 11 (permalink) Old 12-05-2007, 01:57 AM
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Making your own liquids is MUCH cheaper than buying them though.
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post #6 of 11 (permalink) Old 12-05-2007, 12:57 PM
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Quote:
Originally Posted by dthb4438 View Post
Does anyone out there have a preference of dry dosing ferts vs. the liquid dosing that Seachem offers? I still have a bunch of liquids left and I need to know if the amounts would still be the same for dry as it would for liquid?

ie: 1/4Tsp-KN03 3x a week
1/16Tsp-KH2P04 3x aweek
1/16Tsp-K2S04 3x a week
5ml or 1/16Tsp-Trace 3x a week
1-2ml-Fe/Iron 3x a week

I definately don't want to overdose anything, so any advice would be very appreciated. Thanks from a newby.....
Dry ferts are much cheaper, but here's some calculators that will help you to use your Seachem ferts.

I could do it for you if you would of included your aquarium size.

http://www.fishfriend.com/fertfriend.html
http://www.csd.net/~cgadd/aqua/art_p...osage_calc.htm
http://www.aquaticplantcentral.com/f...tor-chart.html
Don't use the fertilator for calculating Seachem's ferts. There's several typo's. It's fine for the dry ferts though. http://www.aquaticplantcentral.com/f...fertilator.php



Using – Mixing Dry Chemicals for Seachem’s Dosing

Seachem’s products are a little expensive, but they are very good. I know some people would like to cut the cost some and use some of the dry fertilizers that are available.

The following dosing solutions will be practically the same strength as Seachem's macronutrient products according to the on line calculators. You then go by Seachem's recommended dosing amounts on the calculator.

Dosing Solutions
- Add 62.2 grams or 11⅛ tsp of KNO3 to 500 mL of distilled water for F. Nitrogen Substitute
- Add 3.5 grams or ¾ tsp of KH2PO4 to 500 mL of distilled water for F. Phosphorus Substitute
- Add 51.0 grams or 8½ tsp of K2SO4 to 500 mL of distilled water for F. Potassium Substitute*

*(This amount approaches the maximum solubility of K2SO4 of 12 grams per 100 mL of distilled water. You will probably need to shake the container each time prior to dosing.)

On line Calculators Used
http://www.fishfriend.com/fertfriend.html
http://www.csd.net/~cgadd/aqua/art_p...osage_calc.htm
http://www.aquaticplantcentral.com/f...fertilator.php

IMO, you may omit F. Trace even though it is included in the calculator.

I do not have a substitute for F. Excel, F. Iron and Flourish at this time.


I hope this helps you. Let me know if it works well.

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post #7 of 11 (permalink) Old 12-05-2007, 02:29 PM
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I use flourish on my 10g tank. You just follow the insructions on the bottle. They say how much is required to raise the concentration by X ppm on a tank of Y size. You should base your calculations on that.

Don't try to do your own calculations based on dry dosing chemicals, since flourish is:
A disolved in water.
B they contain various sources of the chemical, instead of just one as in dry dosing.

Ohh yah if you have a tank of 30 gallons or larger dry dosing is the way to go since flourish is expensive.
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post #8 of 11 (permalink) Old 12-06-2007, 12:35 PM
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But Flourish is not a provider of NPK in any real amounts.
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post #9 of 11 (permalink) Old 12-06-2007, 03:44 PM
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There's an attached file in Microsoft Excel format that you can use for the dosing amounts of Seachem's ferts.
http://www.aquaticplantcentral.com/f...tor-chart.html

As Rex mentioned, there's not very much NPK in Flourish. Dry NPK ferts are the way to go.

For micro nutrients you can use Planted CSM+B, Tropica's Plant Nutrition Liquid, Flourish, etc.

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post #10 of 11 (permalink) Old 12-06-2007, 04:48 PM
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Quote:
Originally Posted by dthb4438 View Post
Does anyone out there have a preference of dry dosing ferts vs. the liquid dosing that Seachem offers? I still have a bunch of liquids left and I need to know if the amounts would still be the same for dry as it would for liquid?

IE: 1/4Tsp-KN03 3x a week
1/16Tsp-KH2P04 3x a week
1/16Tsp-K2S04 3x a week
5ml or 1/16Tsp-Trace 3x a week
1-2ml-Fe/Iron 3x a week

I definitely don't want to overdose anything, so any advice would be very appreciated. Thanks from a newby.....
Hi dthb4438

Your dosing is for a 20g to 40g aquarium, I believe.

I worked on the math some. I had class yesterday. That's why my response was a little short.

Here's the conversions. I used a 30g aquarium to calculate these dosings.

1/4 tsp KNO3 = 4.43 ppm K and 7.02 ppm NO3. This equals 10.5 mL F. Nitrogen.

1/16 tsp KH2PO4 = 0.89 ppm K and 2.15 ppm PO4. This equals 51.6 mL of F. Phosphorus. (I would quickly go to KH2PO4 ASAP for this one.)

1/16 tsp K2SO4 = 1.58 ppm K. This equals 3.9 mL of F. Potassium. Since you also get some Potassium from F. Nitrogen, F. Phosphorus and F Potassium. These three are based on the dry ferts KNO3, KH2PO4 and K2SO4. You can the dose of F. Potassium in a range of 3.9 mL to 11.4 mL. You should start low and increase the dosing if you see pinholes or other signs of Potassium deficiency. (K2SO4's solubility is limited. You can only mix 12.0 g/100 mL.)

5ml or 1/16Tsp-Trace 3x a week - This is OK. Tropica's Plant Nutrition Liquid includes a little extra Potassium and you not need to dose very much K2SO4.

1-2ml-Fe/Iron 3x a week - This is OK too. I use Seachem's F. Iron.

I would definitely recommend that you replace F.Phosphorus and F. Potassium with dry ferts.

F. Nitrogen is derived from potassium nitrate and urea (iminium salt) . I may be wrong, but I think F. Nitrogen is a very good Nitrogen source product, but I still use KNO3.

I hope that this helps you, dthb4438 and good luck.

Take care,
Left C

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post #11 of 11 (permalink) Old 12-07-2007, 06:48 AM
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Would u guys consider this as a big tank or low tank, with that said, dry or liquid fert?
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