Wellis Crystal Micro Plus OEM Antimicrobial Spa Filter – AKU3001

Genuine Wellis Crystal Micro Plus Antimicrobial Spa Filter

Maintain clean, clear water with the genuine Wellis AKU3001 Crystal Micro Plus replacement filter. This OEM cartridge features blue antimicrobial pleated media and the specialized slotted coarse-thread connection used in select Wellis hot tubs and swim spas.

The filter’s nominal media-body dimensions are approximately 175 × 148 mm, or 6.9 inches tall by 5.8 inches in diameter. It provides approximately 3 square meters—or 32 square feet—of pleated filtration area.

The AKU3001 shares its fitment with the white Wellis AKU3000 filter and cross-references the earlier antimicrobial AKU0135 cartridge.

Package includes one genuine OEM Wellis filter cartridge.

🔹 Key Benefits

• Genuine OEM Wellis replacement filter
• Crystal Micro Plus antimicrobial filter media
• Helps capture dirt, debris, oils and other contaminants
• Antimicrobial treatment helps inhibit microbial growth on the filter media
• Approximately 3 m² or 32 sq. ft. of filtration area
• Specialized slotted coarse-thread connection
• Closed top with an integrated removal handle
• Washable and reusable with proper maintenance
• Direct replacement for Wellis AKU3001
• Compatible replacement for the earlier Wellis AKU0135

Important: Antimicrobial filter media helps protect the filter material itself. It does not sanitize the spa water or replace chlorine, bromine or another approved water-care system.

🔍 Compatible Wellis Spas & Swim Spas

The AKU3001 cross-references the earlier AKU0135 cartridge and is used in compatible filtration systems found in select versions of the following Wellis models:

• Wellis Danube
• Wellis Amazonas
• Wellis Rio Grande
• Wellis Volcano
• Wellis Kongo

Earlier Wellis Models

The corresponding filter configuration was also used in select versions of these earlier Wellis models:

• Wellis Dominika
• Wellis Santana
• Wellis Granada
• Wellis Pluto

Wellis has used different filtration configurations within certain models and production years. Do not order by spa model alone. Confirm the filter number, dimensions and slotted coarse-thread connection before purchasing.

📏 Confirm Your Filter Before Ordering

Your existing filter should match the following characteristics:

• Wellis filter number AKU3001 or earlier AKU0135
• Blue pleated cylindrical filter media
• Nominal media-body height of approximately 175 mm or 6.9 inches
• Nominal outside diameter of approximately 148 mm or 5.8 inches
• Closed top with an integrated removal handle
• Approximately 1½-inch SAE male coarse thread
• Alignment slot in the threaded connector
• Same overall end-cap and mounting configuration

Do not substitute the fine-thread AKU3003 simply because its height and diameter appear similar. The thread style and alignment slot must match your existing filter.

If you are uncertain, contact Southern Leisure with pictures of the top and bottom of your existing filter, its measurements and your spa’s model and year before ordering.

📋 How to Replace

1. Turn off power to the spa at the breaker.
2. Remove the filter cover or access assembly.
3. Use the integrated handle to carefully unscrew the existing filter.
4. Clean loose debris from the filter compartment.
5. Remove all protective packaging from the new filter.
6. Do not remove the supporting band from the filter cartridge.
7. Inspect the coarse-thread connector and alignment slot.
8. Position the cartridge over the matching filter-housing connection.
9. Thread the filter gently into place by hand.
10. Do not force, cross-thread or overtighten the cartridge.
11. Reinstall the filter cover or access assembly.
12. Restore power and confirm normal water circulation.

💬 Southern Leisure Says

Matching the Wellis filter number and thread style is the most dependable way to select this cartridge. If your existing filter is marked AKU3001 or AKU0135 and has the same slotted coarse-thread connection, this is the correct OEM antimicrobial replacement.

The AKU3000 and AKU3001 use the same coarse-thread fitment. The AKU3000 has white standard media, while the AKU3001 has blue antimicrobial media. Do not confuse either filter with the fine-thread AKU3002 or AKU3003 cartridges.

Do not remove the supporting band wrapped around the pleats. It is part of the filter’s construction and helps the cartridge maintain its intended shape.

🧼 Care & Maintenance

• Inspect and rinse the filter regularly during normal spa use.
• Carefully rinse between each pleat with a garden hose.
• Clean more frequently during periods of heavy use.
• Use a dedicated spa cartridge cleaner to remove oils and residue.
• Follow the cleaner’s directions and rinse the cartridge thoroughly.
• Do not use a pressure washer, stiff brush or sharp cleaning tool.
• Do not remove the supporting band from the cartridge.
• Maintain balanced water chemistry to support filter performance.
• Replace the filter if the pleats become torn, collapsed or permanently restricted.
• Consider rotating two filters so one can be cleaned and dried thoroughly.

📌 Product Quick Facts

• Brand: Wellis
• Product: Crystal Micro Plus antimicrobial filter
• Manufacturer number: AKU3001
• Cross-reference: Wellis AKU0135
• Same fitment as: Wellis AKU3000
• Filtration area: Approximately 3 m² or 32 sq. ft.
• Nominal media-body height: Approximately 6.9 inches
• Nominal outside diameter: Approximately 5.8 inches
• Top: Closed with integrated removal handle
• Bottom: Slotted SAE coarse male thread
• Filter-media color: Blue
• Package quantity: One filter
• OEM product: Yes

⚙️ Specifications

Manufacturer	Wellis
Manufacturer Number	AKU3001
Earlier Cross-Reference	AKU0135
Interchangeable Fitment	AKU3000 standard-media filter
Filter Type	Crystal Micro Plus antimicrobial cartridge
Filtration Area	Approximately 3 m² or 32 sq. ft.
Nominal Media-Body Height	Approximately 175 mm or 6.9 inches
Nominal Outside Diameter	Approximately 148 mm or 5.8 inches
Top Configuration	Closed with integrated removal handle
Bottom Connection	Approximately 1½-inch SAE male coarse thread with alignment slot
Filter-Media Color	Blue
Package Quantity	One filter cartridge
OEM Product	Yes

❓ Frequently Asked Questions

Is this a genuine Wellis filter?

Yes. This is a genuine OEM Wellis Crystal Micro Plus antimicrobial filter with manufacturer number AKU3001.

Does the AKU3001 replace the AKU0135?

Yes. The AKU3001 is the current blue antimicrobial filter that cross-references the earlier Wellis AKU0135. Always compare the dimensions and slotted coarse-thread connection before ordering.

What is the difference between AKU3000 and AKU3001?

The AKU3000 and AKU3001 use the same coarse-thread fitment. The AKU3000 has white standard filter media, while the AKU3001 features blue antimicrobial media.

What does antimicrobial filter media do?

The antimicrobial treatment helps inhibit microbial growth on the filter material. It does not sanitize the spa water or replace chlorine, bromine or another approved sanitation system.

Will the AKU3003 fit instead?

No. The similarly sized AKU3003 uses a fine-thread connection. It should not be substituted for the coarse-thread AKU3001 unless Wellis has specifically confirmed compatibility with your filtration system.

Should I remove the band around the filter?

No. The supporting band is part of the filter’s construction and should remain installed.

Will this fit every Wellis spa?

No. Wellis uses several filter sizes and connection styles. Confirm the filter number, physical dimensions and slotted coarse-thread connection before ordering.

How many filters are included?

This listing includes one genuine Wellis filter cartridge.

Can this filter be cleaned?

Yes. Rinse carefully between the pleats with a garden hose and periodically use a dedicated spa cartridge cleaner. Thoroughly rinse away all cleaning solution before reinstalling the filter.

When should the filter be replaced?

Replace the cartridge when the pleats become torn, collapsed or permanently restricted, or when proper water flow cannot be restored through cleaning. Actual service life depends on spa usage, water chemistry and maintenance.

🛡️ Why Buy From Southern Leisure?

• Genuine OEM Wellis replacement part
• Compatibility assistance from experienced spa professionals
• Help identifying the correct thread style before ordering
• Convenient shipping and local pickup options
• Trusted by spa owners since 2013

📦 Shipping & Pickup

• Ships as one OEM Wellis filter cartridge
• Shipping and pickup options are displayed at checkout
• Inspect the cartridge, handle and threaded connector upon arrival
• Keep the filter clean and protected until installation
• Confirm compatibility before installing or wetting the filter