new filter

[MAM]

i bought a small sponge/box filter to use in my fry tank (its one that is covered well so it won't suck up the fry). i was going to float it in my established tank to build up good bacteria before i set up the fry tank (soon my fry will be too big for their current floating breeder box). how long should i leave the new filter in the old tank to build up enough bacteria? should i be running it then or just let it sit in the water?

 

[teknikz]

about 2 weeks......but.....what id do is cut off some of the media from ur existin filter in the big tank and use that in ur new small filter....then u got a whole colony of bacteria

 

[Cian McLiam]

As Tenikz said...
Also you need to have a constant flow of preferably oxygenated water through the sponge to build up a really worthwhile colony of bacteria.