Skeety, thanks for the reply.
If i do turn the skimmer off for a while, am i starting from scratch, or will the skimmate still be there.
Im reluctant to leave it on all day.
1) Because my girlfriend wont be impressed with the sounds it makes!
2) Dont want it to overflow when im not there!!
I have also bought Purigen (a filtration sack) as LFS said this will help.
Do I put this in the
canister filter, near the top or bottom of filter?
And is a 400l bag suitable for 180l tank?
(ive asked this on another post, but though id metion it here too

)
thanks