To the OP - for example - If you did 10 1 gallon water changes/day - at the end of 5 days - your nitrate would be about 20 percent higher than doing 1 10 gallon water change/day.
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I added this - @Dave1993. dont know if you saw it: "PS - vodka dosing will not remove these 'other things'. This might be a time to check an ICP test - though I usually do not recommend them - and I have never done one.""The recommended starting dose is 0.1mL per 25 gallons of net water volume per day for days 1-3, followed by 0.2mL per 25 gallons days 4-7, and then the addition of 0.5mL per week (regardless of aquarium volume), until nitrates become undetectable."
There are probably 10 different protocols. I do not think there is a huge danger of getting your nitrate down more quickly i.e. 2 weeks vs a month. And if your nitrate is high - there are probably other 'bad things' that you're not measuring that would also benefit from water changes
PS - vodka dosing will not remove these 'other things'. This might be a time to check an ICP test - though I usually do not recommend them - and I have never done one.
This may be way hasty or less involved than calculating water changes, but during the early days of my tank when I had nitrate issues I used seachem purigen to lower nitrate levels and it worked like a charm and harmed nothing in my tank.
how much vodka do i dose
@Dave1993, This was the schedule I followed. Just make sure that you test weekly and continue to watch after you reach your goal.