I currently have a 125gal tank with 2 magnum 350 filters on it also with a 1500 cascade filter all have full media and i am wondering that with 7 juvenile doviis in it if i should up grade my filtration system and yes i do know that with this many dovii in a small aquarium that i am going to have to move some to other tanks thankfully i have a few options for them such as 2 55s and 2 30s wich will have to do till i can get the 220gal and currently shopping for thanks for any help that you guys can give thanks