Bottom soils and filtering media for rearing fresh-water fish or

Details Bottom soils and filtering media for rearing fresh-water fish or Bottom soils and filtering media for rearing fresh-water fish or

1998-05-28

2000-09-05

Swiatek, Robert P.

Plant husbandry

Water culture, apparatus or method

71 11, 504347, 119246, A01G 3100, C05F 1100

Patent

active

061124591

ABSTRACT:
It has been known that water having a pH value of 5.5 to 7.5 is suited for the rearing of fresh-water fish and hydroponic cultivation of plants. Bottom soils or filtering media prepared by mixing carbonates of alkali metals or alkali-earth metals with volcano-ash-base soils and sintering the mixture into granules. When used in water tanks or reservoirs for fish rearing or hydroponic cultivation, the bottom soils or filtering media thus prepared provide favorable environments for such rearing and cultivation.

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