I have a Hayward sand filter and this will be our third season with the new pool. Do i need to change the sand this year? If not, is there a way to clean the sand other than backwashing? If so, with what and how?
Also, the pool store always says to add the shock, baking soda,... into the deep end of the pool. However, i have read here that some pour it directly into the skimmer, which beats brushing around the bottom of the pool to be sure everything has dissolved. Is there a preferred method?