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I used bio spira and fritz ammonium for ammonia source. I used 45lb of dry rock and added livestock when ammonia zero nitrate 5 or less than 10. First fish added was bi blenny and its active and ate the next day. My wrasse also came out yesterday and ate mysis shrimp. I recently transfered coral from my old tank and they seems doing better.We never discerned bottle bac use
I went solely off living fish within this time frame to assume the tank was cycled commonly either with live rock or bottled bac and twenty days is longer than any of their instruction time on the labels, assessing your cycle done had components
The fact you don't have much ammonia there above signifies it's not built up, fish waste being taken care of is easy for today's bottle bac
how did you cycle it