Advanced Nutrients Professional Grower Bundle Tarantula, Nirvana, Sensizym Plant Fertilizer Enhancer pH Balance, 500ml/1 pt Balance your ph automatically - no ph pens, equipment or chemicals Serious growers with a good level of cropping experience and growers moving up from the expert grower level (as above) Growers who have mastered applying a variety of crop enhancers through the growing cycle will be able to follow the enhanced feeding program The special combination of bacteria, enzymes, carbohydrates, humates, bloom cofactors and vitamins push Growers will have bigger root systems and bushier plants to support the extra demand and yields created by driving the crop's metabolism at higher rates