I don't think I mentioned BDBS?
Use the medium if you choose it but I don't remember the mesh/screen. Think the bags say 20/40?
Lower KH allows more efficient of nutrients.
Surely some form of blasting media that is coal slag must be available nearby.
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Growing is not that difficult.
Last edited by Maryland Guppy; 05-11-2019 at 07:16 PM.