Is there a specific type on anti-freeze I should use in the skimmer when closing my pool? I had it closed but the water rose and flooded the skimmer again so I need to pump all the water back down, drain the skimmer with my shop vac then put the anti-freeze back in. I'm just not sure what type to use. I had someone else close the pool this fall so I'm not 100% sure. Any help would be appreciated.