Oase BioMaster Prefilter Upgrade Kit

Marsoni

M251S

$31.95

Get it in 3 business days with 1 day shipping. Friday, May 29

Oase BioMaster Prefilter Upgrade KitThe Biomaster upgrade kit can be retrofitted to any model Biomaster filter. Kits are available for all sizes, and can be used on both Thermo and non thermo versions of the filter. A newly designed tube inside the prefilter ensures flow rate is maintained for longer, thereby extending the period between cleans of the prefilter foams. Used in conjunction with the new 10ppi foams, this serves to provide adequate prefilter protection for the main filter

Easy Shipping

Quick Dispatch:

Your Oase BioMaster Prefilter Upgrade Kit orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Oase BioMaster Prefilter Upgrade Kit ships.

Need Help?
Questions about Oase BioMaster Prefilter Upgrade Kit, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Oase BioMaster Prefilter Upgrade Kit in your area.

Get Shipping Estimates

Country Zip/Postal Code

Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
Please click here for more details>>> Return & Exchange Policy

I ordered the 32x32 and the fit was exactly what I expected. The slim fit cut looks clean without being too tight through the thighs or calves, and the expandable waistband is honestly one of the best parts. It gives a little extra room when sitting or moving around, but it doesn’t look bulky or obvious like some stretch waist dress pants do. The material feels lightweight and breathable with a little stretch, so they stay comfortable even after wearing them all day. The quality surprised me for the price. The stitching looked clean, the zipper worked smoothly, and the fabric had a nicer appearance than I expected straight out of the package. They also matched the listing photos well and didn’t have that cheap shiny look some dress pants have. I wore them with a dress shirt for work, but they could easily work with a polo or sweater too. The wrinkle resistance is decent and they held their shape well after sitting for long periods. For the money, these feel like a really solid value and I’d buy another pair in a different color.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 25, 2026