First Time Cycling With Existing Tank Water

[Blondielovesfish]

 

You can safely take up to around 1/3 as long as you replace it afterwards. 

 
I saw TTA question this the other day - how can you guarantee the bacteria is evenly distributed over the media, enough to know you can safely remove a 1/3? You could be removing a bigger concentration of bacteria say for example, on the biomedia (ceramics etc) than there would be on a sponge or other type of media?
 

 
True.
I didn't see that, sorry.
 
How much can be taken then?

 

[Sophie]

You can safely take up to around 1/3 as long as you replace it afterwards.

 
I saw TTA question this the other day - how can you guarantee the bacteria is evenly distributed over the media, enough to know you can safely remove a 1/3? You could be removing a bigger concentration of bacteria say for example, on the biomedia (ceramics etc) than there would be on a sponge or other type of media?

 
True.
I didn't see that, sorry.
 
How much can be taken then?

That'd probably be best answered by the man himself!