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HY-GEN have revamped their solutions!
PK Top Up has been designed to boost Phosphorus (P) and Potassium (K) as well as trace elements during the flowering/bloom stage.
Use PK Top Up once the flowers begin to form, usually around week 5. PK Top up is also suitable for run to waste, coco, DWC & all other recirculating systems.
Once you have used PK Top Up for the first time, it will be part of your hydroponic toolbox forever.