Posted: Fri Feb 27, 2015 2:17 pm Re: Would my fluval 406 be good enough to use on a 50 gal
Yep, that's just right. A turtle filter should be rated for a tank 2-3 times the enclosure you're using. The 406 is rated for up to 100 gallons, so it would do well on a 50 gallon tank.