Right now I have a 55 gal. tank and it is home to a Porcupine Puffer and a Volitan Lionfish. They are both babies (2 in. or less in length). I was wanting to upgrade and wondering if a 120 gal would be enough room for the both of them. This is my first time on this discussion board so I hope I did this right. Also, I have a Aqua Clear 300 filter and a Cascade 300 filter on the 55gal will that be enough filtration for these two fish on the 120?