How long to seed new tank w/old filter?
I am seeding my new 25g and Eheim 2215 with the HOB from a well-established 5g. How long do I need to keep this ugly old HOB on my new tank until I can consider the new tank and filter seeded?
Also, how long until this new tank can be considered "mature" and/or "stable"? Right now it has 5 danios but I'm not sure how long I need to wait before adding more sensitive species. (Assuming cycling goes well-- I will be monitoring water parameters of course.)