Will these work for Phosguard?

They are very fine mesh to hold in the finest media particles. But water flows through them easily so I don't see a problem with them working with any media. So I'll say "Yes" they will work with Phosguard.

Would this work as a filter guard for an internal filter in a freshwater aquarium?

If the internal filter can fit into the bag, I think it's a good idea! You can search on amazon:" Alegi fine bags" for different sizes!

Are the zippers made of metal or plastic?

This is drawstring bags. It doesn't contain any metal. is completely safe for both fresh and saltwater aquariums.

I have a cascade 1500 filter from penn and plax can I put 3 purigen bags in 3 of my trays amd what size bad should I use for a 55 gallon tank?

A basic purigen bag will treat up to 100 gallons for 6 months or so with proper regeneration. I use a 250ml bottle of purigen in one of the alegi media bags and have it in a wet/dry for a 90g tank. You won't need 3 for a 55. One will do fine.

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ALEGI Media Filter Bag Aquarium Extra Fine,Reusable 180 Micron Drawstring Mesh Filter Bags for Very Fine Resins Filter (7.5"*3.6" (3 Pack))

Product ID: 181547272

🔄Reusable & durable design

🔒Secure drawstring seal

🧵180 micron ultra-fine mesh

R329

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Description

🐠 Elevate your aquarium game with precision filtration that’s built to last!

BUILT TO LAST REUSE - Heavy-duty nylon and stitching ensure long-term durability and eco-friendly reuse.
SAFE CHEMICAL RESISTANT - Odorless, bleach and acid-resistant, with no rusting metals—100% fish-safe.
SECURE DRAWSTRING CLOSURE - Tightly seals to protect pumps and keep filter media intact—no accidental spills.
PERFECT FIT FOR FINE MEDIA - Optimized size (7.5" x 3.6") holds up to 100ml of very fine resins and activated carbon.
ULTRA FINE PRECISION FILTRATION - 180 micron mesh traps the tiniest particles for crystal-clear water.

The ALEGI Media Filter Bag is a premium 180 micron ultra-fine mesh filter bag designed for aquariums, featuring a secure drawstring closure and durable nylon construction. Sized at 7.5" by 3.6", it perfectly holds up to 100ml of fine filter media like resins and activated carbon. Reusable, chemical-resistant, and fish-safe, it ensures crystal-clear water while protecting your pump and aquatic life.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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R329

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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ALEGI Media Filter Bag Aquarium Extra Fine,Reusable 180 Micron Drawstring Mesh Filter Bags for Very Fine Resins Filter (7.5"*3.6" (3 Pack))

Description

Specifications

Common Questions