I notice by now that the normal white 0.5 micron Pensonic sediment filter (those cheap blocks that cost around RM 8) is better than those which you buy without brand.
In Carrefour for eg, i could get the a package of the "non branded" sediment filter for my twin filter for just RM 8 for 4 blocks. However its filtering is clearly inferior compared with the Pensonic ones, this can easily be demonstrated when you put 1 of the filter (y) to the twin filter that is nearest to the outlet and another "x" filter to the other one.
If you notice the water flows to the (y) and out easily before the "x" filter even reaches 3/4 of its level, that is an indication of very poor filtration, maybe its 0.20 micron or more.
