Recently bought my wife a 54 gallon corner aquarium with lots of colorful fancy guppies for the living room and I need filtration advice. Currently I have an eheim classic filter on it but I have to have the tank about 2 inches out from the corner to have the hoses run. I'd rather have the tank snug fit into the corner so I'm looking for suggestions for a really good submersible filter system or other suggestions. Tank isn't drilled.