The main takeaway is smaller tanks are awesome, thats what I keep and if you’ll go low on fish, high on corals it’ll look great in scale for its size, run smoother, and you can effect parameter control through water changes in each nano vs parameter adjust, and add dosers. It’s a better way for round two. The ability for easy water changes to stabilize things is just why I prefer small tanks to large ones
for years the only parameters I know about my pico reef are the temp and salinity. If anything acts strange, it gets a large water change and I’ve learned the timing to run them before things degrade.