X2 - Introducing the ""NEW"" 10KG Monarch Ultimate which is the baby bag compare to its 25KG bigger brother. The 10KG main advantage is its lighter and easier to store and move around the house without having to worry about trying to shift the larger 25kg bag. What s the difference between Hydrosoft and UltimateTM We couldn t find any; in fact the Ultimate is so pure you can put it on your fish and chips just like you could with the Hydrosoft! Why should you switch to UltimateTM salt Firstly, Monarch are so confident of its quality; they have put our name on it. Secondly, it s BS EN973 approved and great for fish and chips too! Third, the quality of the bag is arguably the highest there is, in fact the bag is marketable in its own right so will only encourage sales where ever it is seen. For optimum performance and efficiency your water softener requires periodically topping up with good quality food grade Pillow Tablet Salt. Made with special care for water softness, Monarch Salt