I brewed my first all grain BIAB this weekend and I apparently started with too much water.

I started with 8.3 gallons of water which is what the calculator told me to start with.

I ended up with about 6.5 gallons and the gravity was 1.03

the gravity was suppose to be 1.054 so I basically made brown water.

I went ahead and put it into the fermentor. I don’t know how my mash went or how to check efficiency?? I mashed at 153 degrees for 90 minutes. Kept the temp pretty close to 153 for the entire time which was difficult as hell.

I am using a keggle that I made and it took forever to get the temperature to rise on the turkey fryer? So I guess my questions are:

Why did I end up with so much at the end??

How do you check efficiency to know if your mash went well??

Can I use extract at the end of the boil if my gravity reading is really low??

Thanks,