Description
Keep your monotub properly ventilated with these self-adhesive filter patches. Each patch is a 70x50mm synthetic filter disc with a peel-and-stick backing, so you can add extra gas-exchange points to any monotub lid, grow bag, or jar in seconds — no drilling required.
Pack of 12 patches, made from fine synthetic filter material that lets fresh air in while keeping contaminants out. Ideal for topping up airflow on our Empty Monotub with filters 45L or any DIY monotub build.
We also sell these on eBay.
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