C
CT Guy
V,
We've had no issues with using more glacial rock dust and basalt in re-amending the soil. We've even experimented with high rates (about 6 cycles in). I think the rock dusts break down so slowly that it's not too much of an issue.
An experiment we have going on:
Using the KIS Nutrient pack soil, we've got a 6 beds that are 1 cubic yard of soil and under 2 - 1000W lights. The beds are on their 6th recycle at 2 packs per yard of soil. Using a "recycle mix" that was mostly comprised of rock dust, basalt, kelp, and alfalfa, we averaged just over 3 lbs per bed. Amending with the Nutrient Pack (only 1 bed), it got 3.83 lbs on the last harvest, which has brought us back to using the Nutrient Packs for recycling.
As a side note, they were testing the PPMs of the runoff and found the soil was at 3,000-4,500 ppm at the end of the cycle, and 8,500 after inoculating with the Nutrient packs at the beginning of the cycle. You'd never get away with that using chems.
We've had no issues with using more glacial rock dust and basalt in re-amending the soil. We've even experimented with high rates (about 6 cycles in). I think the rock dusts break down so slowly that it's not too much of an issue.
An experiment we have going on:
Using the KIS Nutrient pack soil, we've got a 6 beds that are 1 cubic yard of soil and under 2 - 1000W lights. The beds are on their 6th recycle at 2 packs per yard of soil. Using a "recycle mix" that was mostly comprised of rock dust, basalt, kelp, and alfalfa, we averaged just over 3 lbs per bed. Amending with the Nutrient Pack (only 1 bed), it got 3.83 lbs on the last harvest, which has brought us back to using the Nutrient Packs for recycling.
As a side note, they were testing the PPMs of the runoff and found the soil was at 3,000-4,500 ppm at the end of the cycle, and 8,500 after inoculating with the Nutrient packs at the beginning of the cycle. You'd never get away with that using chems.