The Weather has been pretty mild up until now, so at World Of Pools we would suggest that now is a good time for checking your outdoor pool, if it has been Winterised. Check the colour of the water, If it has gone or going green you will need to add some Fi-Clor Superfast Shock, as it does not need filtration to supply the shock dose of chlorine to the pool water. Follow the instructions on the label and add enough to raise the free Chlorine level to 5PPM