If you are using any Canna nutrient or booster in 5 litre, 10 litre or 20 litre sizes then you will know how difficult it can be to unscrew the bottle cap. Canna have realised that this is sometimes an issue for growers and now offer a spanner for loosening the caps on all of their large bottles. Shop customers, just ask a member of staff and we'll loosen the caps for you!
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