i am going to order a 400-440 gallon tank from my lfs and i was wondering what type of filteration i would need and i was wondering how many bags of caribe sea aqaurium sand i would need for the sand layer to at least be 2" deep i will be houseing 3 pbass orino,ocel or mono two arowana one silver one black and one red tailed catfish and possibly a tigriness,juruense or tiger shovelnosed catfish in it?
