Will high nitrates and phosphates stop your corals from opening right up.?

yes and will also hinder a lot of things in your tank. to lower those levels get a gravel siphon and clean the rocks and remove 25% of your water and replace in the morning check your water parameters if high repeat above process. make sure to keep those levels as close to 0ppm as possible. get the trace minerals and add those as well if you don't already. good luck