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Because methylene blue can be toxic to plants and harmful to biological filtration systems
and due to its temperament
100 pH test kits
avoid letting it sit in water Pet-Friendly: No
Highly Versatile
Fritz Freshwater and Saltwater Master Test Kit Tang Because methylene blue can beIncludes one each of kits for the most commonly measured water parameters: Wide Range pH, Ammonia, Nitrite, and Nitrate. Master Test Kit. Perfect for starting a new system. Includes 4 Essential Test Kits. Accurate in both Fresh and Saltwater. Includes one each of kits for the most commonly measured water parameters: Wide Range pH, Ammonia, Nitrite, and Nitrate Master Test Kit Perfect for starting a new system Includes 4 Essential Test Kits Accurate in