I dose Vodka too - cheap easy - See the results tested weekly - but IMO you'd need a skimmer to be on the safe side.
your fish look pretty happy and i love the triggers and the clowns. Your triggers are a pretty good size too. Congratulations it takes awhile for them to get that big. Have you ever thought about adding live rock? helps filter a bit. The rock pieces do look cool but if they had some coraline algae that tank would look amazing
have you looked in to a nitrate reactor , will reduce nitrate fast, there are products to nuetralize nitrate prime is one. you would only need a capful so one bottle will last you a long time
Vodka dosing...add a small ammount of vodka daily - no phosphates, no nitrates. Its how I keep that many fish in my reef.
I dose Vodka too - cheap easy - See the results tested weekly - but IMO you'd need a skimmer to be on the safe side.
Vodka dosing does have "tables" aka guidlines. Basically you need to calculate total water volume not total tank volume. Easiest way - tank x sump or filtration minus one third for rocks and sand. It's best to under estimate rather than over. Test your water for nitrate just before weekly water change this is your starting point. If nitrate reads 80ppm start a list with the date and nitrate reading. Do the w/c and your starting dose 0.1 mil per 25 gal. Say your total water volume is 100 gal. your 1st dose is 0.4mil. Do 0.4mill for 3 days then double the dose that's 0.8 mil for 100 gal. At weeks end test for nitrate before w/c (this is a constant) write it down. if still 80ppm increase the dose each week by 0.5mil until the nitrate reading drops at weeks end. Once the Nitrate drops - do not increase the dose - wait til the next weeks readings. If nitrate continues to drop then this is your daily maintence dose however you can get drops and the following week back to 80ppm - if this occurs add 0.5mil more til nitrates consistantly drop each week, eventually becoming zero. Here comes the controversial part - some ppl hold at the maintence dose others than try to ween the system so to speak by slowly decreasing the daily dose by 0.5mil weekly while continually testing to make sure zero nitrate is holding. It can take a month or more before you see results.
Why the slow process - because you can overdose the tank. Common signs of overdosing - slime algae, black sludge build up in the tank, and lathargic fish due to a reduction in 02. Basically the Vodka (Ethanol) increases reproduction and growth in bacterial colonies inturn the colonies create a greater volume of skimmate which has assimilated the nitrate and phosphate which inturn is removed via the skimmer. The skimmate is black sludge and smells like a septic tank. I suspect dosing vodka without a skimmer would be piontless, do more harm than good, and a potental nightmare of black sludge build up and smelly water.
I just use the cheapest 80 proof I can get...its about $10 for 2.1 liters.
You are going to want a good skimmer...and one that is oversized and powered.