>>928627good luck and have fun this summer! I started 2 years ago with aquaponics and it dominated my free time ever since. I would recommend using IBC containers because they are cheap, made to hold liquids in all conditions and very modular.
You just have to know what it was used for or buy it new. Backyard aquaponics has a nice free book about this.
www.backyardaquaponics.com/Travis/IBCofAquaponics1.pdf .
The minimum size of your pomp shut be determent by the volume of water. for a good functioning system you should be able to circulate all the water at least 1 an hour.
My setup is 1 fish tank (900L/238g), 2 growbeds (total of 1.05m3/277g) and 1 sumptank. This year i have grown 30 jade perch. They where +/-100gr when I bought them and i raised them till they where +/-450gr over a period of 4 months.
I used 21kg of fish feed for this. (location = Belgium)
