Velqori
One-Kilo Filter Grow Bags
$18.00
One-Kilo Filter Grow Bags are empty mushroom grow bags for home growers making small oyster mushroom blocks. Each pack contains 10 polypropylene bags with a 0.2 micron filter patch. The expanded bag measures 14 × 10 × 32 cm and holds up to 1 kg of hydrated hardwood substrate. Substrate and mushroom culture are not included.
For small indoor oyster batches
Use these bags when preparing individual hardwood substrate blocks for oyster mushrooms at home. The one-kilo capacity suits growers who want to compare batches without filling a larger bag. During colonization, keep the filter patch exposed to air rather than pressed against another block.
Polypropylene with a filter patch
The bag body is 0.08 mm polypropylene, rated for temperatures up to 121°C. Each bag has a 5 × 5 cm filter patch with a nominal pore size of 0.2 micron. The patch allows gas exchange during colonization. It does not replace substrate treatment or clean inoculation.
Check your equipment first
These bags have an open top and require an impulse heat sealer with a jaw at least 24 cm long. Check your pressure vessel's instructions for bag loading and closure before heating. The material temperature rating is not a sterilization schedule.
From colonization to fruiting
Once an oyster block is fully colonized, cut a fruiting opening in the bag as directed by your culture supplier. The bag holds the substrate together; it does not control room humidity. Fruiting conditions depend on the oyster strain.
Key attributes
- Pack quantity
- 10 empty bags
- Bag material
- Polypropylene
- Film thickness
- 0.08 mm (80 microns)
- Expanded bag size
- 14 cm wide × 10 cm deep × 32 cm tall
- Substrate capacity
- Up to 1 kg hydrated hardwood substrate per bag
- Filter pore size
- 0.2 micron nominal
- Filter patch size
- 5 × 5 cm
- Material temperature rating
- Up to 121°C
Fit and sizing
Each expanded bag measures 14 cm wide × 10 cm deep × 32 cm tall. Fill with no more than 1 kg of hydrated hardwood substrate and retain at least 10 cm of unfilled bag above the block. Allow additional vessel clearance for the rack and follow the vessel's bag-loading instructions. An impulse sealer needs a jaw at least 24 cm long.
Questions and answers
Do these mushroom grow bags contain substrate or spawn?
How much substrate fits in each bag?
Can I heat these bags in a pressure vessel?
What does the 0.2 micron filter do?
Do I need a heat sealer?
Are these bags intended for oyster mushrooms?
Can I reuse a bag after harvesting?
Reviews
★ 4.7 · 385 ratingsRatings and reviews on this page are simulated. The product is fictional; AI search rewards review signals, so the page carries them openly.
I used these for one-kilo oyster blocks. The extra space above the substrate made it easier to flatten the top for sealing.
The bag size worked for my small batches. I had to check my sealer jaw length before starting.
I could see the oyster mycelium through the bag as it spread. Keeping the filter clear was straightforward with this block size.
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