I've read through the thread again and I have a few comments about the lighting situation for your tank!
1) If your octopus isn't in a room that gets regular direct sunlight, it may be worthwhile to invest in an overhead tank light that is set to a timer, just to give your animal a semblance of a night/day cycle. A light that can gradually brighten and darken at morning/night would be ideal, but even just an on/off light on a timer should help your animal have a more "natural" experience rather than the lights coming on and off as you move around through your house. It's important that you get a light that isn't too bright for the animal. Typical aquarium lights for corals and algae are usually much too bright for an octopus.
2) Octopuses can totally see in red light. They have no problem finding prey and maneuvering around their enclosure with a red light. Because of this, I would suggest only using a red light to ease their transition out of darkness in the morning and back into darkness at night. This would obviously require a more complex lighting system, and doesn't seem totally necessary from my point of view.
I don't think I would recommend leaving the red light on all night considering they can see with that amount of light. The light may bother them if it is particularly bright.
It's good to hear your animal is eating from a stick! I would encourage you to keep feeding them this way, because they will likely slowly become more comfortable eating off the stick and it will become easier to track your animals diet and feeding habits. When I was taking care of pygmy octopus (O. chierchiae) I fed adult individuals once every other day. There's two reasons for this.
1- scavengers like octopuses rarely eat every single day in the wild, and, while we don't have to worry about our octopuses getting fat from over feeding, poking around the enclosure with a stick every day is a good way to annoy your animal.
2- Your tank will be cleaner if there is less food waste, and there will be less food waste if you do not feed every day.
If you try this feeding schedule and your animal is moving about their tank a lot and spending time poking at the lid etc. they may be looking for more food and it may be worthwhile to try to feed every day, or two days on/one day off. Ultimately it's up to you to decide how much to feed them, these are just my experiences with pygmy octos.
It's not uncommon for octopuses to be uninterested in food for the first week or so after shipping so I wasn't surprised to hear that they weren't eating after the first few days, and I'm very glad to hear they are eating from the stick now!
If you haven't already, please consider making a thread in the "Cephalopod Journals" section of the site. Then we can all keep tabs on your experiences with the octopus! (And it's a good place to share photos as well

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