ADDENDUM 27/04/15:
I received an answer from the manufacturer.
Quote: "... the proper dosage is 2 to 2.5 tablespoons to 1,500 liters.
If you want to weigh it: 50 g to 1,500 liters.
In leaflets unfortunately a misprint had crept - Thank you for your note.
The one with the tablespoon measure is a "auxiliary words", because very few have a balance in the garden ... "
Meanwhile, I have properly dosed the second application in the pond. Have it specially ordered my all 3 kg bucket, because that is much cheaper relative to 1 kg can. After two weeks, the stuff will have no effect. But on the contrary. Because where previously there were no algae because there once were stones, now algae bloom in abundance.
My conclusion so far: I have no idea which has a calorific value euro note. Remember however, the total issued by me would have been more effective Eus 61.35 on the grill as a charcoal substitute.
I will report after the third application on ...