Not wanting to get into CO2 though. Just kind of wanted a simple tank, lol.
No they're not too bad, but they appeared in only a couple days, which really threw me off guard. But as I've said, I halved my lighting, so I'll let it run a while and see where I get. Hopefully it is just a part of maturing.Good for you - nothing wrong with keeping it simple, and I don't think there is any need to intervene to 'fix' this
But diatoms, as others have said, are part of the story of a maturing tank.
They're actually helping the tank come into equilibrium.
Also, from the photos, they don't look too bad to me.