Pike, looks normal just keep an eye on it.
Surface scum is normal, if you haven’t already increasing agitation can clear it but not always. It can hinder oxygen exchange but I wouldn’t worry at this stage too much.
If your into fish on you tube just stick to reputable channels, they all have their own version of a cycling video on there in their back catalogue:
King of diy (DIY projects but lately more general fish keeping videos, mostly aimed at keeping costs down)
George farmer (aqua scapes/planted tanks)
Rachel O’Leary (awesome species profile videos)
Aquarium Co-op (runs a fish store in the US but puts out loads of good general fish keeping content)
There are a few others but those are probably the biggest.
Surface scum is normal, if you haven’t already increasing agitation can clear it but not always. It can hinder oxygen exchange but I wouldn’t worry at this stage too much.
If your into fish on you tube just stick to reputable channels, they all have their own version of a cycling video on there in their back catalogue:
King of diy (DIY projects but lately more general fish keeping videos, mostly aimed at keeping costs down)
George farmer (aqua scapes/planted tanks)
Rachel O’Leary (awesome species profile videos)
Aquarium Co-op (runs a fish store in the US but puts out loads of good general fish keeping content)
There are a few others but those are probably the biggest.