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Manganous Oxide
In absence of water
Use 1 capful (5 mL) of Reef Strontium per 80 L (20 US gallons) or aquarium water twice per week
Manganous oxide
API High Range pH Test Kit - Measures pH From 7.4-8.8 - for Freshwater & Marine glow Manganous OxideUse to measure pH changes in marine aquariums, aquariums with African cichlids, and very alkaline tap water. Reads the pH of water within the high range of 7. 4 to 8. 8.
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