At 20 ppm and definitely finished the cycle I would do your big water change and start adding some fish. Sounds like you’re all set!!23 days to cycle using Frtyz Zyme fishless fuel and and export media brick soaked in Microbacter 7 and daily doses of the same. Waiting to get a little more established to put in the Tangs and turn on the lights.
Question: one mega water change or wait til my nitrates drop on their own. Refugium is up and running…
im seriously considering this tank or the 85 as I like the long and low look.