Styrofoam?

Can I use it in my aquarium for a floating island to put plants on?

 

I wouldbt because
1- Styrofoam is messy
2- its Styrofoam lol
no I wouldn't because over a period of time it would get yucky and messy but I like your idea of a floating idea. do more research maybe and its 100% you'll find another idea you'll enjoy

 

I'd go the route of a floating turtle platform instead.

 

Ive seen aquaponic systems that use a large block of it to put plants

 

Ive seen aquaponic systems that use a large block of it to put plants

even though it works, its not the best