I shall be starting my first extract brew this week
![🤞](http://cdn.jsdelivr.net/emojione/assets/3.1/png/64/1f91e.png)
1) I'm making a 5L batch so will prepare 10L of water, as my tub of C.tabs has 1 tablet upto 25L should I use just half a tablet.
2) should I cover the bucket of water+C.tab. when leaving it overnight or leave it open.
Thank you for any help.