Zatarain's Crab Boil Seasoning- Sack Size

How hot is this? I really like the pro boil but can't find it in the larger tubs anymore

How much of this for a 30 quart pot. Shrimp and crab boil.

How much would you need to use for 29 qt pot?

If i did 15 pound of crawfish, 10 pounds of shrimp, and 10 pounds of 10 pound of snow crab how much of this would i use?