I have an Intex 18ft diameter, 4 ft deep pool, am using a GAME sand filter and was given BioGuard Stingy sticks. Where the heck do I put the stingy sticks and how do I get chlorine into my pool. I'm used to using pools that use filters and you place the chlorine in the middle of the filter. Is there some sort of container I should buy that will float in the pool to slowly dissolve the stingy sticks? Thanks in advance!