Would it be okay to add any of these in my goldfish tank?
Could you please fill in your aquarium information? We can only respond to questions like this if you've shared everything about your tank (what fish, how many, size of tank, etc.). Thanks.
Welcome to Fishlore. With more information about your tank we'll be able to offer suggestions. Are you having an algae outbreak? Or are you simply wanting to add to your tank?
What are the size of your goldfish?