I measured the amount of vinegar dosed today and it was very close to 20ml, so there is no calibration issue. I lowered the daily dose to 16ml.
I know there is no magic number and it all depends on so many factors, but what daily dose do you have in mind as an average for a 20 - 25 gallon tank that is fully stocked and fully cycled (> 1 year old)?
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