Priceless Fertilizer and CO2 calculator - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 8 Old 05-03-2008, 03:53 PM Thread Starter
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Priceless Fertilizer and CO2 calculator

Download it! I have used it for everything I dose and it works! Is very good for the basic plant keeper to determine how much to dose and what your CO2 levels are. It is a must have and will be used often!
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post #2 of 8 Old 03-25-2009, 05:57 PM
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Thanks that is a really good tool! it worked for me!
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post #3 of 8 Old 11-02-2009, 08:39 AM
The only trouble with it is CO2 calculators are innacurate.
What happens if you pH6.6 and KH4... does that mean you have 30ppm CO2 striaght out of the tap

Somehow i dont think so... This conversion table only works when there is no acidic substances in the water, except bicarbonates, clearly this is impossible because we add Nitrate & Phosphate to the water. Even if you dont, fish still produce it!

Thanks, Aaron
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post #4 of 8 Old 11-08-2009, 08:28 PM
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could you explain how to use the app if a comprehensive fert is being used such as seachem flourish?

its a half a inch of water and you think your gunna drown
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post #5 of 8 Old 11-09-2009, 04:48 PM
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Originally Posted by fighttest View Post
could you explain how to use the app if a comprehensive fert is being used such as seachem flourish?
This chart is intended for those who want to use individual nutrients on their own; this is not recommended for low-tech or natural type systems because the balance in such a setup is very close and there is not considerable room for error. Such systems are better served by comprehensive nutrient fertilizers.

The idea behind using a good comprehensive fertilizer like Flourish is not having to figure out how much of this and that. Flourish Comprehensive has all the necessary nutrients and in the correct porportion according to how plants are known to use nutrients. I believe Kent Freshwater Supplement is the same, or close to it. So all the aquarist needs to do is dose the product according to the instructions, a measured amount per gallon or whatever, without worrying about overdosing or underdosing a particular nutrient.

The equation is also affected by the light and CO2. While strictly speaking CO2 is a nutrient (carbon), it enters the aquarium through fish respiration and biological actions of bacteria and so forth. Overdosing with nutrients (here thinking of macro-nutrients and micro-nutrients such as would be in fertilizers) without sufficient light and CO2 to balance will certainly lead to problems. Generally speaking, plants can't keep using nutrients without sufficient light and CO2; some plants can store certain nutrients but this is limited and there are plants that are not effective at this. It is far safer to aim for the balance. The CO2 will be what it is, so the aquarist has the light and fertilizer nutrients to adjust in order to balance the CO2. Increasing the CO2 by adding more fish might require adjusting the balance of nutrients and light; light should always be the limiting factor. Plants will photosynthesize (grow) up to the point at which some factor is no longer available, what we call the limiting factor in the equation.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]

Last edited by Byron; 11-09-2009 at 04:50 PM.
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post #6 of 8 Old 02-08-2011, 03:58 PM
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This link is broken.

Originally Posted by Christople View Post
^^ genius

Soil Substrates Guide:
Part 1
--------- Part 2

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post #7 of 8 Old 02-16-2011, 08:47 AM
Ya, link no longer works.
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post #8 of 8 Old 02-21-2011, 10:13 AM
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Thanks, guys. We unstuck the thread.
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