Zeo has a start dose same as prodibio. It's called zeostart2. Documentation says it can make a new tank with new water ready for additions within 3 weeks. I haven't used it to cycle a tank so no first hand experience here.
I used the Bioptimum and never had a cycle. I did buy 250 lbs. of live rock though. And did not have much die off at all. I never had an ammonia spike. I was adding corals in two weeks. I don't know if this is normal.
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