Hello. I'm new to aquaponics and thanks for this forum.
My question is where can I get the water for fish.
I'd like to have 800 gallon over for initial use.
Can I use water from lagoon? If so, how to clean?
Can I use tap water? If so, how to clean the chemicals in the water?
Should I buy clean water? If so, where can I get it?

I'm in North California.
Thanks in advance.