I started opening my pool yesterday and after adding some water I turned on the filter and added chlorine to shock the pool. Today I went out and noticed that 2 of my 4 return jets are not pushing out any water. Specifically, the 2 return jets on the main stairs are working while the shallow end and deep end jets have no water coming out. I didn't check these two jets yesterday so I'm not sure if it was like that from the start or if this started sometime in the last 24 hours. I did backwash today when the filter pressure started to rise, but that didn't help any.
Any advice on what my next steps should be. I've never had an issue with any of my return jets over the years.