I'm putting up a 9 m2 greenhouse (374cm long x 249cm wide x 260cm high = 148" x 98" x 102" ~ 97 sq ft) I'm having a bit of trouble visualizing how much I can put into it. I have 2 1000L IBCs, which I plan to use as fish tanks, and essentially do two separate systems. In part in order to have different fish in each. Tilapia in one and African Catfish in the other. So, I know I'll need at least 100…