Thank you all, and sorry, forgot that the tank size wasnt listed, it IS a 30 gal
. tank. the emperor, penguin sound good and I have seen, but the filstar is new to mine ears and eyes, mates. Ill investigate further, by the way: does this filstar,s cannister fit well into tight areas? I seek the feel of there yet out of sight. I often see at petsmart the powerheads and filter media adaptors, they cath the eye due to the miniscule nature. any further arguements and opinions are welcome. P.S. sorry veruca, meant not to perturb you by lacking details, thanks however for pointing my misnomer. G'day!