Updated On February 19th, 2018
Pet's info: Fish | Unknown - Fish | 0.01 lbs
Answered By Angel Alvarado, LVT 44
Licensed Veterinary Technician
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RO water is devoid of minerals and trace elements that help stabilize pH and other parameters. If you can add these after filtration then use your RO water. Otherwise, RO is commonly used to "top off" fish tanks that lose water via evaporation.
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