i use the full line of fox farm in sunshine mix and you guys are right at full strength you will get some burn when the plants are small, however i have found that once the plants are a bit bigger you can do full strength as long as you water enough to get a fair amount of run off, im in the first week of flower with some blue cheese and sour diesel and im using full strength nutes and not getting ang burn, i use the grow big hydroponic because it is buffered to 6 so i dont have to worry about messing with ph which is nice