Dosing Ferts - The Planted Tank Forum
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post #1 of 18 (permalink) Old 01-23-2005, 05:17 AM Thread Starter
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Dosing Ferts

I think I am going to start dosing my tanks w/ ferts to make them grow more gradually.

The tank is a 20 gallon high, so far i've got a DIY C02 bottle producing carbon, and also Flourish Excel which also produces carbon.

Would I need, KNO3 (potassium nitrate) and K2SO4 (potassium sulfate)? If I do end up getting these ferts, how much do I usually dose a week?
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post #2 of 18 (permalink) Old 01-23-2005, 08:21 PM Thread Starter
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Anybody???
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post #3 of 18 (permalink) Old 01-23-2005, 08:33 PM
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It will depend on how much lighting you have and to some extent what type of plants you have.

Re-boot!
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post #4 of 18 (permalink) Old 01-23-2005, 08:49 PM Thread Starter
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I've got 2.75g x 20g = 55 watt (math is fun!), and so far I have dwarf sag., bacopa, wisteria, sprite, fern, barteri, and ludwigia.
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post #5 of 18 (permalink) Old 01-23-2005, 09:05 PM
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This is what you need

Plantex CSM+B 1lb. Price: $8.59
KN03 Potassium Nitrate 1lb. Price: $2.17
KH2P04 Mono Potassium Phosphate 1lb. Price: $3.42
K2S04 Potassium Sulfate 1lb. Price: $2.17
Iron Chelate Price: $8.59
Magnesium Sulfate 1 lb. Price: $0.85
http://www.gregwatson.com/products.asp?cat=8
Fe and Mg.. that would be enough to last you a lifetime and a half, so that is up to you, but definitly get the other stuff.


Use this chart & cut all the dose's in half, maybe a little more, for a 20g for starters, or go to chuck's and do the math to mix your own keep a close eye on the plant's, they are your best indicator's.
http://www.triplexclan.com/Aqua/reg.jpg
That will get you started

Craig

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post #6 of 18 (permalink) Old 01-23-2005, 09:13 PM
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By Chuck's, he means http://www.csd.net/~cgadd/aqua/art_plant_aquacalc.htm

Well, at least my algae is pearling...
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post #7 of 18 (permalink) Old 01-23-2005, 09:35 PM Thread Starter
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Chucks caculator is pretty confusing, I was confused on trying to caculate how much I should dose.

I'll probably go with the chart and just divide my doses by 2.3 that way it's all balanced.

Oh by the way, would I need all those powdered fertilizers if not, which are the most important ones?
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post #8 of 18 (permalink) Old 01-23-2005, 09:46 PM
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See https://www.plantedtank.net/fertilizers.html for target levels.

Well, at least my algae is pearling...
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post #9 of 18 (permalink) Old 01-23-2005, 09:55 PM Thread Starter
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So for the target levels on that article is for any size tank? or a certain tank in particular?
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post #10 of 18 (permalink) Old 01-23-2005, 10:05 PM
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Target levels are in parts per million, i.e., a ratio between units of nutrients and units of water. As such, they are scalable for any size tank. PPM is for all intents and purposes the same as milligrams per liter. If you play around with the calculators a bit, you'll get a better feel for them. There is another one at http://www.aquaticplantcentral.com/f...ertilator.php?

Well, at least my algae is pearling...
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post #11 of 18 (permalink) Old 01-23-2005, 10:21 PM Thread Starter
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I'm guessing that was much easier. Let me know if my weekly dosage is incorrect for a 20g planted tank.

Weekly Dosage:
2.93g of Potassium Nitrate
0.26g of Potassium Phosphate
3.37g of Potassium Sulfate
0.76g of Magnesium Sulfate
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post #12 of 18 (permalink) Old 01-23-2005, 11:13 PM
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Basically, what the calculators will tell you is how much change will result from adding X amount of nutrient. They will not tell you what the nutrient levels in your aquarium or tap water are. How much of each nutrient you will need to add to maintain the target levels is unique to each aquarium, and depends upon a multitude of factors (lighting level, types of plants, levels of nutrients in tap water and at least a few others). You can determine nutrient levels (except K) by water testing or by using the estimative index approach https://www.plantedtank.net/forums/sh...timative+index.

Well, at least my algae is pearling...
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post #13 of 18 (permalink) Old 01-23-2005, 11:42 PM Thread Starter
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Oh I see, I get it now. So basically the caculators tells me how much of the nutrients are in my tank?

Just had a few words with greg, and these should be the main fertilizers I should get.

Plantex CSM + B 1lb. Price: $8.59
KN03 Potassium Nitrate 1lb. Price: $2.17
KH2P04 Mono Potassium Phosphate 1lb. Price: $3.42
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post #14 of 18 (permalink) Old 01-24-2005, 12:02 AM
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It's more like, "OK, I just tested my nitrates and got a reading of 5 ppm. I really want to get them back up around 10 ppm. How much KNO3 do I need to add to take my 90 gallon tank from 5ppm to 10 ppm? Let's go to Chuck's calculator and figure it out..."

Well, at least my algae is pearling...
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post #15 of 18 (permalink) Old 01-24-2005, 12:24 AM Thread Starter
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Oh okay, I get it now ...

So basically you dose as much as the plants, fish could handle.
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