I always use wilmas at the min, I use ionic nutes and get good results, as for yeild......the best I got so far was 16oz from two plants in the 4 pot wilma, only used two plants cos it was a scrogg and two was more than enough to fill the rack. Bit of advice is to flower them while there still pretty short, the wilmas grow fuckin bushes and with the plants not too far apart it can become tight for space in there