Question

Can someone read over this paragraph and tell me if I should add anything? thanks.

My terrarium has a geosphere (my plant and soil) , biosphere (oxygen) , hydrosphere (the water I used to feed my plant) , and finally, my atmosphere (an LED plant light) .
These are the things my plant needs to survive.

Answer 1

Remove the 'my' in the sentences, basically if you want it to be grammatically correct rewrite like this:

The terrarium that was built has a geosphere, the plants and soil, an atmosphere, the oxygen that allows the life to grow, a hydrosphere, the water the plant uses, and finally a source of light. Overall this makes a biosphere which allows the plant to survive and thrive.

Also you mixed up biosphere with the atmosphere.