The principle
Cycle before you stock. Food-grade IBC only, a backup air pump as life-support, a water test kit that is non-negotiable, and no fish in the system until it is biologically cycled and legal with DGAV/ICNF.
Materials
- Small–medium wall stones
- topsoil/compost
- herb cuttings (oregano/thyme/marjoram/lavender/rosemary)
Tools
- See E-fast-build-design-catalogue.md §8
Reclaimed from
Slate/granite offsets + spent garden soil + herb scraps (local propagation)