kirstenk
23.5 Degrees
Totally inaccurate information.
Below, I copied a post from Jorg Kokott who wrote the article on Vodka dosing.
DSB tanks react very sensitively on vodka supplementation, thus be careful! If you run a DSB without a skimmer, you should add one to your tank.
Vodka should be supplemented daily during the lighting phase.
You can start with 0.1 mL/100 L for the first three days.
Then you increase the vodka volume to 0.2 mL/100 L for day 4-7.
Subsequently to this initial week you increase the vodka dose by 0.5 mL per total tank volume (this is important, do not dose on a per 100L basis, but on the total tank volume!) every week.
So, e.g. for a 500 L tank:
day 1-3: 0.1 * 5 = 0.5 mL
day 4-7: 0.2 * 5 = 1 mL
2. week (day 8-14): 1 mL + 0.5 mL = 1.5 mL
3. week: 1.5 mL + 0.5 mL = 2 mL.
After these 3 weeks you should recognize changes in the nutrient levels (nitrate, phosphate). If the nutrient levels are still unchanged, you should further increase the dose by 0.5 mL per total tank volume.
As soon as you recognize either nitrate or phosphate to start dropping you shouldn't further increase the vodka volume but watch the nutrient levels, even in the first three weeks.
You should log your nutrient measurements and monitor the nutrient levels on a regular basis (every 3 days).
As Heinz said, skimming is important and you will recognize your skimmer to work much more effectively.
I have posted the dosing recommendation as I fear that people start dosing vodka by using too high volumes. I still recommend to wait for the article.
