Editing Walstad method
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== Alternative names == | == Alternative names == | ||
− | + | El Natural, NPT (Natural Planted Tank), Walstad Tank. | |
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* 1 inch layer of inexpensive, generic potting soil (or "top soil") available from any garden centres or various home improvement stores. ([[Wikipedia:John Innes Compost|John Innes]] number 3 recipe is ideal). Avoid soils containing chemical fertilizers (sulphates and nitrates will be converted to toxic H2S and nitrite after soil is submerged). Phosphate and calcium fertilizers (i.e., a little bone meal mixed with soil) may be beneficial. Get non-sterile 'aquatic pond soil' if it's available. | * 1 inch layer of inexpensive, generic potting soil (or "top soil") available from any garden centres or various home improvement stores. ([[Wikipedia:John Innes Compost|John Innes]] number 3 recipe is ideal). Avoid soils containing chemical fertilizers (sulphates and nitrates will be converted to toxic H2S and nitrite after soil is submerged). Phosphate and calcium fertilizers (i.e., a little bone meal mixed with soil) may be beneficial. Get non-sterile 'aquatic pond soil' if it's available. | ||
[[Image:John Innes front.jpg|thumb|Soil based compost - John Innes #3]] | [[Image:John Innes front.jpg|thumb|Soil based compost - John Innes #3]] | ||
− | * | + | * 1 inch of medium fine gravel (or very shallow layer of sand) to cover the soil layer (the soil bacteria need oxygen, so don't smother the soil layer with rocks, driftwood, etc) |
* If you have soft-water, you can mix in a calcium source (lime, coral gravel, shells, bone meal, etc) with the soil to make sure plants get enough calcium, GH for their initial set-up. | * If you have soft-water, you can mix in a calcium source (lime, coral gravel, shells, bone meal, etc) with the soil to make sure plants get enough calcium, GH for their initial set-up. |