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- Apr 25, 2020
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i have 500 mg pills and 100 gallons total water volume, if i disolve two pills in a liter of RODI what is my daily dose and do you do a water change between each treatment?I think you need to dose 43ml. Based on your 1mg / ml concentrate using 2 500 mg tabs in 1000 ml. 90 gallons is 340L. 0.125 mg / L means need to dose about 42.5 mg to treat tank or 42.5 ml per your solution.