Conversion from Grams per Meter Square to Grams per Liter

[lelebloom]

How is different a solid diluited fertilizer from a liquid one? is not.
The problem persist evevn if I want to use diluited organic matters.

For a liquid fertilizer for hydroponic you read 10 ml per Liter, so you if you have a reservoir of 2 liters, you will add 20 ml.
Got it until here?

NOW:
If you have instead a solid ferilzer which states 30g per m SQUARE not cubic.
How is converted in liters? how much of these should I put in my reservoir of 2 liters?
If it had something like30g per liter I would have add 60 grams but nothing is stated.
JUST 30grams per squared meters. like so:
https://www.compo.com/international/...egetables.html

How would you use it in Hydroponics?