Don't forget that Zeo and Ultra systems are based on nitrate reduction by bacteria also. Their programs are a little more systematic. I have used vodka to reduce nitrates (10 ml/100g/day) and it has worked. It was more to feed my SPS than for the latter. In case of Fishoholic's tanks...a massive cheato scrubber would be better. In the long run it is way cheaper. I like ozone(...yeah I know you don't steve)
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