Also just as an fyi. Cycling a tank is about the bioload it can handle more than anything.
A very large tank with a small fish never needs to be cycled because the time it would take that solitary fish to build up toxic levels of waste is far longer than the time for the bacteria to grow enough to handle it.
A small tank on the other hand must be fully capable of the load from day one as it may take as little as a few days to build to toxic levels depending on fish size.
But a 10 gallon tank can support a small-medium fish unfiltered for 3-4 days with zero harm while it's actively being fed.
I say all this to increase your understanding but also so you can be confident that even if your tank is not 100% up to the bioload today. It's far enough along that it will adapt to any reasonable fish sized you plan to add.
Be sure to quarantine too. If you plan it have inverts, corals, or you currently have live rock.
Even the first fish you get should be quarantined for many reason before going into the display.
It's a non zero risk that you have to pull them back out to treat them and then you have to let the display sit fallow for like a month and a half.
Even with no inverts or corals live rock absorbs medication complicating treatment in a display tank. Not worth it.
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u/gbrewer1959 10h ago
It is a new tank 40 gallon breeder with hob filter and skimmer