Most of us seed our tank with live rock. We also enjoy the aesthetics behind coralline algae. It would make sense to have a photoperiod and possibly even watch mg
, and calcium and alkalinity.... So so many times customers come in with 2-3month old aquarium and ask how to get the coralline to grow.
They do not have any corals yet but if they were dosing I bet you there'd be some coralline (as long as it was seeded in some way of course)
So I wouldn't go no lights. And that's more more reasons than just growing purple algae... Heard of diatoms?
I would not put the hermit in the aquarium with nitrite either, I was just saying you potentially could get away with it. While hyperbole, I was just saying the test before putting them in isn't too necessary unless your tank is brand spankin new haha.
Everyone has their prefers for their own reasons in this hobby. That's why its a hobby. And it's a very fun one to find your own way to do. I even like to add coral as quickly as I can. There's no reason not to. Unless you wana say the elements are going to be depleted quicker in the beginning because of massive coralline growth.