Monotub Adhesive Filter Disks (6-Pack)
Monotub Adhesive Filter Disks (6-Pack) is backordered and will ship as soon as it is back in stock.
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Description
Description
Six 2.5" adhesive filter disks — enough to outfit a standard four-hole monotub with two spares. Peel the backing, press them over any vent hole up to 2.25", and you have measured, repeatable air exchange instead of a wad of polyfil. Clean them with 3% hydrogen peroxide when the grow is done and use them again.
- 6disks per pack
- 2.5"disk diameter
- 2.25"max hole size
- 3Madhesive backing
- 1 tubplus spares
Why growers switch from polyfil
- Consistent airflow — identical filters on every hole, so conditions repeat from tub to tub and grow to grow.
- Nothing to pack or tape — peel, press, done. No stuffing, no hot glue, no micropore tape lifting in humidity.
- Water-resistant fiber — misting and a saturated chamber won't soak the media the way loose polyfil wicks moisture.
- Reusable — clean with 3% hydrogen peroxide between runs rather than replacing filter media.
- Tidy build — a flat white disk instead of stuffing hanging out the side of the tub.
What you get
- 6 adhesive filter disks, 2.5" diameter
- Water-resistant synthetic fiber filter media
- Professional-grade 3M adhesive backing, pre-applied
How to use them
- Cut your vent holes — anything up to 2.25" across. A 2" hole saw is the common choice and leaves a good margin for the adhesive.
- Clean the surface — wipe around each hole with alcohol and let it dry fully. Adhesive will not grip a damp or dusty tub.
- Peel and press — center the disk on the hole and smooth it down from the middle out so the full ring of adhesive makes contact.
- Run the grow — the disk passes fresh air while keeping airborne contaminants out of the chamber.
- Clean and reuse — peel after harvest, wash in 3% hydrogen peroxide, dry completely, reapply.
Developed with Microppose. The original disks, custom manufactured for monotub work rather than repackaged HVAC media — sized so a 2.5" disk fully covers a 2.25" hole with adhesive contact all the way around.
Specifications
| Spec | Detail |
|---|---|
| Quantity | 6 disks |
| Disk diameter | 2.5" |
| Maximum hole size | 2.25" |
| Filter media | Water-resistant synthetic fiber |
| Adhesive | Professional-grade 3M pressure-sensitive backing |
| Reusable | Yes — clean with 3% hydrogen peroxide and dry fully |
| Works with | Monotubs, Martha tents, shotgun chambers, bulk casing trays |
| SKU | FD4 |
Frequently asked questions
Is six enough for one monotub?
Yes. Most monotubs are drilled with four holes, two per long side, so a 6-pack covers a tub and leaves two spares. If you run extra holes in the lid or ends, step up to the 20-pack.
What size hole do these cover?
Any vent hole up to 2.25" in diameter. The disk is 2.5", leaving an adhesive margin all the way around the opening. A 2" hole saw is the most common size growers pair with them.
Are they really reusable?
Yes. Peel the disk after the grow, clean it with 3% hydrogen peroxide and let it dry completely before reapplying. Adhesive grip softens a little each time a disk is peeled and moved, so press firmly onto a clean, dry surface when you put it back.
Will they stay stuck in a humid fruiting chamber?
They will, as long as the tub is clean and dry when you apply them. The media itself is water-resistant, so misting and high humidity won't saturate it the way loose polyfil wicks moisture.
Can I use these on something other than a monotub?
Yes. They work on Martha tent panels, shotgun fruiting chambers, bulk casing trays, buckets and storage totes — anywhere you need filtered gas exchange through a hole up to 2.25".
