oh dear you live and learn eh !! i have a bonsai so my find a use for it yet
You have done very well.You have purchased a worthwhile product at a very low price.
I would never pay £9 99,but I would buy some for £2.
Its an excellent medium for mixing in with other good soil just follow the advice on Muntys link,and you wont go far wrong. Meanwhile be happy because you done good.
Munty would be very happy if someone gave him a barrow full.