Monotub Adhesive Filter Disks (20-Pack)
Monotub Adhesive Filter Disks (20-Pack) is backordered and will ship as soon as it is back in stock.
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Description
Description
Polyfil stuffed in a hole is a guess. These 2.5" adhesive filter disks peel and stick over any vent hole up to 2.25", giving every tub the same measured air exchange — and when the grow is finished you clean them and use them again. Twenty disks covers five standard four-hole monotubs.
- 20disks per pack
- 2.5"disk diameter
- 2.25"max hole size
- 3Madhesive backing
- Reusablewash & reapply
Why growers switch from polyfil
- Consistent airflow — every hole gets the same filter, so tub-to-tub conditions actually repeat.
- Nothing to pack or tape — peel, press, done. No stuffing, no hot glue, no micropore tape peeling off in humidity.
- Water-resistant fiber — misting and a saturated fruiting chamber won't soak the media the way loose polyfil wicks moisture.
- Reusable — clean with 3% hydrogen peroxide between runs instead of throwing filter media away.
- Clean look — a flat white disk instead of a wad of stuffing sticking out of the side of the tub.
What you get
- 20 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 the area around each hole with alcohol and let it dry completely. Adhesive will not grip a damp or dusty tub.
- Peel and press — center the disk over the hole and smooth it down from the middle outward so the whole 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 the disk after harvest, wash it in 3% hydrogen peroxide, and let it dry fully before the next application.
Developed with Microppose. These are 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 | 20 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 | FD20 |
Frequently asked questions
What size hole do these cover?
Any vent hole up to 2.25" in diameter. The disk itself is 2.5", which leaves an adhesive margin all the way around the opening. A 2" hole saw is the most common size growers use with them.
How many disks does one monotub need?
Most monotubs are drilled with four holes, two on each long side, so a 20-pack outfits five tubs. If you run extra holes in the lid or on the ends, count those too.
Are they really reusable?
Yes. Peel the disk off after the grow, clean it with 3% hydrogen peroxide and let it dry completely before sticking it back down. Adhesive grip does soften a little each time a disk is peeled and moved, so press firmly onto a clean, dry surface on reapplication.
Will they stay stuck in a humid fruiting chamber?
They will, provided the tub is clean and dry when you apply them. The filter 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. Growers use them 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".
Should I buy the 20-pack or the 6-pack?
The 6-pack covers a single tub with a couple of spares and is the right call for a first build. The 20-pack drops the per-disk cost and is worth it once you are running more than one tub or replacing disks across a season.
