Thank You. Yes I still dose vodka and have started dosing vinegar too. I seriously reduced the amount I was dosing because I was having a bacteria bloom in my sump and the walls of my aquarium. I never saw a reduction in nitrates but I do like the improved performance of the skimmer.mcrist...i just read through your tank build thread. Beautiful build!!! I was wondering about a DSB but decided to just have one in the sump with the mangroves. Have you continued dosing with Voka? I was going to start in the next week or so!