There are 2 sizes of this product on a different website. Can anyone verify if this is the 21 or 31 cubic in. version?

I am unsure what u mean by 21/31 cubic in, I bought this cartilage for my 100 gallon per day aquatic life ro filter and have since put out hundreds of gallons of 0ppm water, it has started changing color but still has long way to go, without the di cartilage the filter puts out 15ppms with the intake water being just under 200ppm

How often do i need to replace this cartridge?

It's refillable. Top cap is removable and replacement resin may be purchased much cheaper than a cartridge. Depends on amount of water passed through it as well as how contaminated it may be.

Will I need to purchase any tubing or any other additional pieces aside from the RO Buddie itself?

Yes you will need extra tubing for the r/o buddie. I just got my r/o buddy a few days ago. Make sure you cut the tubing clean. Otherwise it will leak. first 10 gallons have been 0 ppm. And my saltwater tank looks amazing.

My cartridge does not remotely look green, it's more like a shimmering black, purple, and blue. Anyone else had that problem?

Is it blue when new or it turned blue? Mine is green. I think if it's blue it's used.

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Aquatic Life DI Color Changing Mixed Bed Resin Cartridge

Aquatic Life DI Color Changing Mixed Bed Resin Cartridge

Product ID: 260510229

Details

Brand
Aquatic Life
Item form
Granules
Item weight
0.99 Pounds
Number of Packs
1
Unit count
1 Count

🌈Color-changing resin for easy monitoring

🔄21-cubic inch resin capacity

🔧Includes mounting clips for seamless installation

327.26 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay ahead with water clarity that speaks volumes!

TRUSTED QUALITY - Highly rated with 4.6 stars from 1,370+ users
EFFORTLESS SETUP - Mounting clips included for quick, secure attachment to RO Buddie
PRECISION PURITY - Achieve near-zero TDS for crystal-clear water
COMPACT POWERHOUSE - 21-cubic inch resin packed in a sleek, clear cartridge
VISUAL RESIN STATUS - Color-changing cartridge lets you know exactly when to replace

The Aquatic Life DI Color Changing Mixed Bed Resin Cartridge offers a 21-cubic inch capacity of high-performance resin that changes color to indicate exhaustion, ensuring you never miss a replacement. Designed for easy installation with included mounting clips, it delivers near-zero TDS water purity, making it a top choice for RO Buddie users and aquatic enthusiasts alike.

Specifications

ASIN	B00DSP57BQ
Allergen Information	Nut Free
Best Sellers Rank	#13,785 in Kitchen ( See Top 100 in Kitchen ) #46 in Water Filter Cartridges
Brand	Aquatic Life
Brand Name	Aquatic Life
Customer Reviews	4.6 out of 5 stars 1,370 Reviews
Global Trade Identification Number	00810957012427
Included Components	Aquatic Life DI Color-Changing Mixed Bed Resin Cartridge for RO Buddie
Item Form	Granules
Item Type Name	Resin Cartridge
Item Weight	0.99 Pounds
Item form	Granules
Item weight	0.99 Pounds
Manufacturer	Aquatic Life
Manufacturer Part Number	330242
Model Number	330242
Number of Items	1
Number of Packs	1
Pet Type	Fish
Target Species	Fish
UPC	810957016685 810957012427
Unit Count	1 Count
Unit count	1 Count

Reviews

H**.

Works great

Work very well … TDS almost 0 👌🏻

25.01.2022

J**E

Highly recommended

Good quality product

2.08.2022

S**A

Very nice , but costly

Brought 14 tds to ZERO . Nice, but a bit costly

20.07.2020

S**N

Good product

Perfect filter for Ro Buddie

4.05.2024

N**S

It really works!

I'm impressed! It actually reduced TDS from 56 to 2 TDS! Distilled water I bought shows 1. It leaked a bit first time I installed. But I put Teflon tape and is no longer leaking. I know it's not supposed to be used for drinking water, but I have to taste it! Water tasted better than the bottled distilled water. Also water is clearer! Very easy to use, like plug and play, seems durable and I wasn't expecting the unit resin is replaceable. So that is s big plus.. compatible with my ispring, uses 1/4 tubing that plugs in. Comes with brackets.. Pricewise it's not that cheap but it's not that expensive!

14.06.2026

J**.

Check cap it was loose, but it works great!

Easy install on my RO system dropped my water TDS from 47 to 0 .

11.02.2026

L**L

works for Aquatic Life system

works good in my Aquatic Life system

13.07.2026

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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327.26 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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