Are these aquarium plant seeds

[Owp]

These came in the pots of my aquarium plants, can I put them in my gravel and they will grow I assume they are seeds?

 

[goatnad]

It could be fertilizer pellets. What plants were they found in?

 

[Owp]

They were in the red ocelot sword or the Anubias I forgot which one

 

[Autumnsky]

My guess would be osmocote fertilizer. There is a preferred osmocote food to use, I do not know which one it is, just showing this to see when you scroll down what they look like...
Outdoor & Indoor Plus - Planters Place