Hey santb, good to have you along. This journal isn't updated as much as my previous one because everything is growing my slower now it's winter.Not sure of the exact pot size, I've used a few different sizes. The largest would probably be about 7-8 gallons (26-30L). But, all of my pots have holes drilled in the bottom half so the roots can grow out into the grow bed.All plants would do better in full sun. The autos in particular were very sensitive to nutrients and I burned them. As well as over watered. From what I've read, many autos take longer than the breeder specifies (even when grown under optimal conditions indoors).The are currently about 70 fish in the tank, 10 are quite large (over 30cm) and the rest are smaller. The water is recirculated through the grow beds so yes, it is used straight. I have had one of these systems set up with goldfish before and I didn't get the same results. I don't think their poo is as good as other species, but, I'm sure it would still be beneficial for a compost heap. But it would probably be easier just getting chook or cow manure.You might find shade cloth blocks out too much sun. Look for proper greenhouse film/plastic if possible.I have purchased from Bonza as well, but nowadays buy solely from Herbies Seeds