@ Huzi, the brick format products are "palm peat", not a spagnum moss at all.
You can buy a 5 litre brick at any Pick n Pay hyper in the Gardening section, should be about R30.00, I buy and mix with a bit of vermiculite. The brick is about the size and shape of a house building one but expands to 5 litres in water, thats actually rather a lot...
The problem with Spagnum moss per se is it tends to be a bit acidic, while palm peat is pH neutral.