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In general terms
See table below
Ideal when installing Spillway Bowls or Basins on a patio
nitrogen and phosphorous that is part of the sludge will slowly be released
API® KH Test Kit Maximum Head Height_2.5 Feet In general termsThe API KH TEST KIT tests fresh or saltwater aquariums for carbonate hardness (KH), and helps monitor water quality and prevent invisible water problems that can be harmful to fish and plants. Carbonate hardness stabilizes aquarium pH, and can be used to determine the proper dose of pH buffers. Contains 1 test bottle, easy to ready instructions, test tube and color chart
