Gram scales - The Planted Tank Forum
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post #1 of 4 (permalink) Old 03-29-2013, 11:45 PM Thread Starter
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Gram scales

What scales do I need to measure dry ferts? I see them on Amazon, that have a variety of different #'s Like 1000X and 650X. What one do I actually need?
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post #2 of 4 (permalink) Old 03-30-2013, 01:20 AM
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A digital scale that weighs by the tenth or hundredth of a gram. They can be had for around 6 dollars. Double check it with change. Nickel weighs five grams etc...

The trays usually suck.. use a Dixie cup, tare the scale with that instead of the tray.

Last edited by steven p; 03-30-2013 at 01:20 AM. Reason: tare... spellcheck changed it to rare
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post #3 of 4 (permalink) Old 03-30-2013, 01:42 AM
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Pretty sure you're better off measuring volumes. Weights of dry ferts vary considerably with moisture content.
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post #4 of 4 (permalink) Old 03-30-2013, 09:09 AM
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Originally Posted by xmas_one View Post
Pretty sure you're better off measuring volumes. Weights of dry ferts vary considerably with moisture content.
And volumes vary with packaging form (powder versus prills, etc)

Scales are generally better, as long as you take water of hydration into account.

Most of the chemicals we use for fertilization are not too hygroscopic either, so as long as they are stored generally well, a scale would produce the most reliable measurements over time.


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