Hi, we were given a used pool last August, so it was only up for a little over a month and I guess we did ok. However, upon opening this year it was a murky deep green. We started aerating then put some granulated shock/algicide and it was no longer green but is still a cloudy blue. I did read the instructions before posting but the only testing products we have are the strips and a 3-way test kit. Since the strips aren't accurate, suffice to say that all of the levels read normal except for a high level of bromine (although I don't have exact numbers). The pump and filter have been running non-stop 24/7 for over a week. We have been backwashing every day or two. We have been shocking 2 or 3 times a week. We tried algicide once more. We have used used a clarifier twice but have read in several places not to add this more than twice or else it may do more harm than good. We did have the water tested a couple of weeks ago at the pool store and, although I know the numbers are porbably not still valid, everything was within acceptable range then as well, except for slightly low alkalinity, which has since been corrected with baking soda. I did attempt the 3-way test kit prior to posting but the chlorine/bromine indicator turned much too dark to even be measured by the kit and it said that measurement had to be within the acceptable range before attempting to measure the pH, so I didn't bother. BTW...we are in the Piedmont Triad area of NC (central part of the state) and new sand was put in the filter in August when the pool was set up. We did use a sand filter cleaner. A lot of websites have said to vacuum to waste to get the large "stuff" out but then a lot have also said not to vacuum until you can see the bottom because you never know what's in there. Please help. I do intend to purchase a better test kit, but in the mean time, could someone point us in the right direction, as we seem to be already doing what most people say to in order to clear this problem up. Thanks.