So I put new filter cartridges in my penguin350 hob filter. I've had the old ones in there for over 6 months and have been rinsing them. They are starting to fall apart. How long should I leave them in with my new ones to build up the BB on them?
jcolon said:I've heard / read 2 weeks minimum ... but I'd say give it a month ... that should seed enough bacteria to your new cartridges.