I can help you with this one.
I went to my local AG supplier on the weekend & bought 1 x 25kg bag of Zeolite. Asked him the same question about application rates. We eventually worked it out with some quick Math...
It said to use "1 - 2 Tonne per hectare". (I went for the more, the better)
1 hectare = 2.5 acres & 2 Tonne = 2000kg.
4,000sqm = 1 acre, so 10,000sqm = 2.5 acres.
I needed 100sqm worth so that is equivalent to 1/100th of 10,000sqm, which is 100..... Sooooo, 2000kg divided by 100 is 20kg. Think that's right??
It was $16.50 per bag as well.
Also our Bunnings had the Olsens Green Bio, which suprised me. It did take a while for the girl to find it over the phone though.
Hope this helps.
Cheers,
Mike.
I was told I'd need a min of 2 bag for my 100 m2 lawn area. the bags were 10kg size. The bags of spongolite were 15kg. I also added 2 bags of this to my 100m2.