I need to SLAM my pool asap. After opening we found out the pump was dead. Had it replaced today and the pool is a total swamp. I check the cya level and get no turbidity ....I can see the black dot even with comparative tube is full. However I know there was some when we closed last year. I don't want to underestimate the cya and get it too high making SLAM harder or near impossible but I also don't want to SLAM with no cya. I first tested before the new pump had time to recirculate all of the water. Should I let it pump overnight and check again? Just not sure what to do next but this swamp needs some chlorine quick!