I am running the Emperor 400, I have the Penguin 170 on my 35g freshwater tank, both made by Marineland, I like all the Marineland products, I just purchased 2 Eclipse system 6's for my betta's, the whole filter system is in the lid, also by Marineland, I am a bargain shopper, I always try to price things before I purchase, The LPS here was charging $75.00 for the Emperor 400, I found it online for alot cheaper , Its the same link I posted for the liquid gravel vac,
www.thatpetplace.com
Good Luck
Mercey
once you got there just go to fish.....filtration.....then power filters.....its first on the page