Beginner or expert, what have you learned about the hobby so far?
this, never let yourself feel like you've got it because, you don't. Keeping fish tanks alive is rolling a ball up a hill, never may you let go, you are Sisyphus.The number one thing regarding our hobby which I have learnt over the years is that no matter how good you think you are, there is always something around the corner that can potentially bring your fish keeping world come crashing down. You need to be on your toes constantly, never become complacent in your approach.