Trying to save my Celebration Bermuda Lawn

when my sod was first put down back in March, I watered every day as it’s over 100 degrees during the summer time, but it started turning brown once the summer hit in June. After a suggestion from someone else, I may have been over watering, so I put out a tuna can, and timed how long it took to fill. I have 2 zones, one is for sprays and it took 40 minutes (I put the can in the area that gets the least amount). I did the same thing for the other zone that has rotors, and it took 90 minutes. 90 minutes is too long because it puddles up, so I split it to 45’s. After performing the test, I didn’t water for the rest of the week and waited until the next Sunday and water 1 inch again. I was due for another fertilizer treatment, so I did what Scott’s recommended, and put down some turf builder lawn food 32-0-4 on Saturday. Today I reached out to the company that laid the sod, and he explained that he’s got 6 calls about the exact same thing in the same development. He said he ran a soil test and suggested that I put down some 7-20-20. I told him that I just put down some 32-0-4 this last Saturday, and he said that would be fine. I’m asking you all, is that okay??? He also wants me to put down some FST (whatever that is) What do you guys think? Zip code 93263

When they laid the sod did they roll it?
Also when you water you want to water enough that it goes down into the soil below the sod and you don't want to water more than once a week once the sod is established, the objective is to get roots growing down into the soil below the sod.

High nitrogen is a bad thing in this situation, but since it is done, the best thing to do now is get a root stimulant on that grass.
If that sod has been down since march I am afraid it may be dead, Bermuda should be green during the summer heat, especially with your watering it as you have.

In summer it is best to water just before sunup so the grass blades can dry out before the sun rises high in the sky. Never water just before sundown, that will promote fungi growth.

where you live is far better to tell us than giving your zip code, can not locate a USDA zone by a zip code.  The more details of your local conditions, the better advice or suggestions we can give you.

I live in Bakersfield, Ca. It’s Central California. It was laid in March, and no they did not roll it. It was green to greenish from March to June, and has been slowly turning brown from June to August. So, you’re saying I should go ahead and put down the 7-20-20. Also what is fst?