I've made several over the years, mostly 30 to 40 years ago, biggest one was 3000 gal. I all I have are power hand tools.The one I want to build will be 96" long, 48" wide. and 24" tall, it will hold about 600 gallons. I'll probably have to build it and set it up on my carport, I'm thinking marine fish, sharks, rays, skates, a trio of queen angels Maybe mackerel, cobia, pigmy barracuda, moray eels, and maybe see if my old knack of propagating live corel is still with me.
For my fish farm I plane to breed them not catch them but I can still catch and sell marine fish and I happen to know where the best ones are.
It will give an excuse to start snorkeling, great way to get into shape...
I am hesitate to say it but I plane to breed pygmy sturgeon and if I can't a few of them I'll go with shovelnose sturgeon...