Maxspect Nano-Tech Denitrification Catalyst Refill 5 Pack
SKU: 42615698383

Maxspect Nano-Tech Denitrification Catalyst Refill 5 Pack

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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Maxspect Nano-Tech Denitrification Catalyst Refill 5 PackMaxspect Nano Tech Denitrification Catalyst Refill 5 Pack Maxspect Nano Tech Denitrification Catalyst Refill 5 Pack is used to remove nitrogen from wastewater in freshwater marine and reef sump filtration systems. Denitrification is becoming more commonly used to remove nitrogen from sewage, municipal, industrial, and agricultural wastewater to counteract pollution. Various types of denitrification reactors and methods are now used and are effective

Maxspect Nano-Tech Denitrification Catalyst Refill 5 Pack

Maxspect Nano-Tech Denitrification Catalyst Refill 5 Pack is used to remove nitrogen from wastewater in freshwater/marine and reef sump filtration systems.

Denitrification is becoming more commonly used to remove nitrogen from sewage, municipal, industrial, and agricultural wastewater to counteract pollution. Various types of denitrification reactors and methods are now used and are effective in removing nitrate from agricultural runoff and even manure. Perfect for your freshwater/marine and reef sump filtration.

The Anaerobic-Block should be cleaned or replaced every 6 months for optimal results, however when cleaning/replacing old Anaerobic-Block, DO NOT replace all of them at the same time. Clean/replace half of the Anaerobic-Block such that there are sufficient bacterial colonies remaining to re-establish themselves in the newly cleaned/replaced Anaerobic-Block.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
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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
SKU: 42615698383

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4.6 ★★★★★
Based on 572 reviews
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Paige
Carnegie, US
★★★★★ 5
Definitely worth the price
Size: 6.5, Color: Black/Black
Absolutely love these boots! I originally bought them to wear in NYC in December & they did not disappoint. They were comfortable, cute, durable and worked well in the slush/snow. The traction on the bottom is also nice! They kept me warm with wool socks. I wear them almost daily now. Perfect for everyday. easy to wear with variety of outfits. Good every day shoe.
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Reviewed in the United States on January 3, 2026
K
Verified Purchase
Kimberly
Draper, US
★★★★★ 5
Snagged a deal
Size: 7, Color: Redwood/Gum 10
I waited and waited to get these boots! I knew I was chancing it, but they went on sale, and I snagged them! I am a size 7, and they fit nicely with socks. a little loose, barefooted, but what psycho wears boots without socks? They are comfortable and really well-made.
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Reviewed in the United States on April 8, 2026
A
Verified Purchase
ashlynnk
Bozeman, US
★★★★★ 4
Cute, comfortable waterproof boots (a little snug to put on)
Size: 7, Color: Velvet Tan/Gum 2
These are really cute Chelsea-style boots and feel very comfortable once they’re on. The waterproof material is great for wet weather and the sole feels sturdy with good traction. They look stylish enough to wear casually but still feel practical for rainy days. The only downside is they can be a little difficult to put on at first because the opening is somewhat snug, but once they’re on they fit well and feel supportive. Overall they’re a great waterproof boot and I’ve enjoyed wearing them.
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Reviewed in the United States on March 17, 2026
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Verified Purchase
Abby B
Belleville, US
★★★★★ 5
Surprisingly great for my wide feet and high instep!
Size: 10.5, Color: Velvet Tan/Gum 2
So thrilled I took a chance on these. Finding boots is impossible for me. I have wide feet, a super high instep, a bunion on one foot, and I wear a hard to find size (10.5). I ordered the 10.5 and 11 in these expecting I might need to size up for width (if I could even get them on). It was a struggle getting the 10.5s on the first time, and once I did they were somewhat uncomfortable on the top of my left foot. But I read that they would relax so decided to give it a go because I need waterproof boots for an upcoming trip and the 11s felt too long. After two days of light wear, they are already breaking in and I have no more discomfort. Getting them on is already easier and they are plenty wide enough and very comfortable to walk in. These are true to size. Super happy and worth a day of mild discomfort to break them in!
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Reviewed in the United States on March 7, 2026
E
Verified Purchase
EE
New York, US
★★★★★ 5
Comfortable, sturdy, waterproof
Size: 9.5, Color: Black/Black
Loce, love, love these boots. Have walked ten miles with no foot pain around NYC. They go with everything and and are so comfortable. As they are waterproof/resistant, they get a little warm in high temps, but perfect three-season boots.
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Reviewed in the United States on May 17, 2026

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