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Crushed Black Granite Works as Grow Media

In a flood and drain style Aquaponic system where a grow bed is flooded and then drained to mimic the natural cycles in an estuary, the plants need to root in a sub-strate, also known as media. There are many choices for media including: pea gravel, washed river rock, expanded clay balls (commercially known as Hydroton) and expanded shale. In Western PA, crushed gravel and river rock are problematic because of the limestone content which can wreck your fish tank’s water chemistry by the chemicals that naturally leach from the rocks. The media needs to be pH-neutral Hydroton and

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Urban Farming with Aquaponics

If Chicago and Milwaukee can make Aquaponics work, there is no reason Pittsburgh can’t. Source: Food First The urban farming movement is gaining momentum. But for areas with limited or contaminated greenspace or a short growing season, aquaponics can be an alternative agricultural system. This new type of urban farm has popped up in underused and empty industrial spaces in a number of declining urban centers. The aquaponic system was pioneered by Will Allen at his non-profit farm Growing Power in Milwaukee, Wisconsin. The vertical farming model pairs fish production with hydroponically grown vegetables. Ammonia excreted by the fish

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