i have 3 geo's only about 2 inches long an 2 severums about 1 1/2'' an I'm not getting rid of my xp3 i will just experiment with new media i guess a fluvalfx5 is overkill o a 90 gallon maybe if i get the 180 i have always wanted i might think about it but not guna happen anytime soon, any problem is fixable if you throw enough cash at it but to fix the original prolbem with the equipment i have that should be doing a great job is what im after, thanks