4" Sieve Single

Regular Price
$30.00
Sale Price
$30.00
Regular Price
Sold Out
Unit Price
per 

Micron Size: 500 micron

Color: Blue

Big Frenchies Size Charts
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Baby Onesie Size Chart

onesie size chart


Women's T-shirt Size Chart

women's t-shirt size chart


Men's T-shirt Size Chart 

men's t-shirt size chart


Infant Long Sleeve Onesie Size Chart

Size Chart - Infant Organic Long Sleeve Onesie

Infant Rib T-shirt Size Chart

Size Chart - Infant Organic Rib Tee

Youth Short Sleeve Crew T-shirt Size Chart

Size Chart - Youth Organic Short Sleeve Crew Tee

Unisex Sweatshirt Size Chart

Size Chart - Unisex Sweatshirt

Infant Rib Pants Size Chart

Size Chart - Infant Rib Pants

Buy 3 sieves or more and save 7% at checkout, no discount code needed! 

Our 4" stackable sizes are four inches wide and just over four inches tall. The top part of the sieve is three inches tall from mesh to top. 

4" Copepod Sieve; 50, 120, 250, 500, 850 micron stackable sieve, mix and match for a unique color, in stock ready to ship. 

Designed & printed in house now, use the sieves we use daily. Made using American made, 100% reef safe PETG filament. These are built to withstand the harsh saltwater conditions and won't squash the copepods on the side like other brands. 

These are made with European polyester mesh, not the pesky stainless steel that needs to be washed in tap water after each use. These won't rust, they are easy to clean and rinse off before next use. 

50 micron are great for harvesting rotifer cultures daily or when you need to collect copepods and need to return nauplius to your culture. 

120 micron are great for harvesting adult Tisbe, Apocyclops adults to feed your fish after harvesting. If growing Tigriopus we recommend putting the pods that collect in this sieve back in the culture vessel. 

250 micron great for collection adult Tigriopus and Apocyclops copepods, we harvest and bottle this size of tigriopus copepods. 

500 micron is great for helping catch debris from culture vessel on Tisbe/Apocyclsops copepods, this micron will also catch adult Tigriopus copepods. 

850 micron is great for catching larger debris and algae from your copepods vessels. 

We use 850, 500, 250, 120 and 50 micron sieves when harvesting copepods each week. You will get a clean harvest of mostly adult pods when you use more sieves. You will collect small debris, molts and phytoplankton in the 50 micron sieve and we recommend placing contents back in vessel to help copepod populations stay dense.

How long will it take to ship my order?

Your order will be shipped within 3-8 business days.

How much does it cost?

We offer free trackable shipping on select items.

Shipping rates for partner brand items and international orders may vary and will be calculated at checkout.

Where is my order shipped from?

Big Frenchies apparel is shipped in plastic-free packaging directly from our Virginia facility. Items from our partner brands may have different packaging and can be shipped from any of their fulfillment locations worldwide.

How long does shipping take?

USA: 3-8 business days
CA, AUS, UK, and Europe: 5-21 business days
Rest of world: 5-25 business days

As a small family-owned business, we thrive on your feedback, so it's vitally important for us to make sure you're happy with your purchase.

Our return policy is simple: You have 30 days from delivery to request a return or exchange for most products shipped within the United States.Learn more about our full return policy.

Please note:

  • Returns are only available for US orders. International orders are final sale.
  • For health and safety reasons, personal care items (like baby creams, shampoos, balms, sunscreens, and lotions) and food products cannot be returned once opened.
  • Custom and handmade items are final sale and cannot be returned or exchanged, as they are crafted specifically to order.
  • A restocking fee may apply to certain eligible returns. If applicable, this will be communicated upon return authorization.

You can reach out to our customer support team by submitting your request via the "Contact Us" form or by emailing us at support@bigfrenchies.com. A member of our support staff will respond to you as soon as possible.

We'd love to hear from you!
The best way to reach us is via email: support@bigfrenchies.com.

Have questions about sustainability, shipping, return, exchange or something similar?

Check our FAQ page.

What Makes Our T-Shirts Special?

Making a Difference

By choosing organic cotton clothing, you are using 50% less water, 50% less energy, and 46% less CO2. By choosing Big Frenchies, you are also planting a tree with every order.

Ethically Made in USA

We strongly oppose child-labor, and that's why all of our products are proudly made in USA by a small, family-owned business.

Designed in France

Our unique designs are created in Paris, so you will feel the French love every time you wear our clothing.

GOTS-Certified Organic Cotton

From seed to shelf, Big Frenchies' entire supply chain is inspected by a third-party auditor to ensure that all suppliers are adhering to GOTS standards.

Non-Toxic

The cotton we use is grown by organic farmers in an environmentally-friendly way, free of toxic chemicals.

Amazingly Soft & Durable

With no chemicals to weaken the fibers, our organic cotton clothing is more durable and softer than conventional cotton clothing, which makes it a great choice for people with sensitive skin.

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