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Optimum is one of our popular nutrients. We have sold it since 1991 and it has always been a safe nutrient brand. Available as Optimum Grow and Optimum Bloom for the leafy and flower/fruiting stages respectively.
It is a complete and balanced A and B pack and is suitable for hydroponic systems with clay, perlite or rockwool growing media. It can also be used in Coconut coir if needed, but an GT Coco specific nutrient is available also. We first started selling Optimum in 1991 and its been popular all that time.
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