Posted: 02/09/2014 at 20:36
Panda......if you have bought a block, you can hack off as much as you require at any one time. Depending what you want to use it for, you can either soak it in water or soak it in a feed. Just keep your unused block dry and then you can take off what you need in the future.
It isn't really like normal compost...........you will need to add whatever nutrients you want /need.