Hmm, well i have had the shark for like 3 months so i dont think they will take it.....
And one of barbs is a Jumper.....so i dont know if i can put it at top...
Right now the shark is in a plastic containter, maybe the size of a icecream containter.
And i dont have a airstone, if you mean like the airpump.
I have always wanted to buy one and i plan on buying one....
I do have planets for oxygen...