I'd just like to get some opinions on the most efficient way to prepare the water for my brew day. I'm pretty new to brewing and still using extract with a few specialty grains.
I've read it's good to steep the grains in just a gallon or two of water, then add 1-2 more to boil the wort, finally adding more in the end to hit the 5 gallon goal. I'm using city water, which needs to be dechlorinated before use. I'm using (pieces of) campden tablets for this purpose, but it seems rather complicated and likely wasteful to individually dechlorinate each addition of water.
I'm considering preparing a 6-7 gallon bucket of water, dechlorinating it once and then pouring water into the brew as needed but I'm concerned about possible contamination, particularly in the final water addition. If I make sure to clean and sanitize the bucket and then keep it covered while dealing with everything else will it be okay after 1-2 hours of sitting?