Sorry one more - does this have any affect on the fish?

To much Co2 can kill fish you can get a inexpensive drop bell co2 sensor. Fluval makes a plastic one but most a glass. They work off a chemical reagents. Depending on the size you fill the bell with aquarium water and a few drops of the chemical that simply changes color from blue low co2, to green safe co2 to yellow high co2. Depending on the model it suctions cup attaches or hangs on the aquarium to sense co2 levels hope this helps.

how long last each bottle?

The bottles will fill the diffuser 55 times. If you fill the diffuser twice a day as most recommend the bottle should last about 27 days.

Can anyone tell me how long a cartridge lasts in a 15 gallon?

depends on how high you turn it. I use mine with a different diffuser since the diffuser it comes with blows. basically you're paying for the thing you screw it into. One the bright side, you can buy 16 oz co2 cartridges for dirt cheap instead of the expensive 20oz refills from fluval. seriously, if you do that it's a worthwhile buy. Instead of getting 3 for 12 you can get thirty for 20 or so.

What's the largest cartridge that I can use in this? Can the 88g fit?

The biggest that can fit is the 20g cartridge, unless you can find the same thread size on another cartridge, but good luck in your findings. The 88 g cartridge thread size is too big for the valve that the 20 g comes with.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Hagen FL Mini Pressurized 20g CO2 Kit

Product ID: 4598329

Details

Brand
Fluval
Item Form
Gas Cylinder
Item Weight
11.52 ounces
Number of Packs
1
Unit Count
1 Count

💧Efficient ceramic diffuser

🧪20g CO2 cartridge capacity

⚙️Precision regulator valve control

Description

🌿 Elevate your aquarium game with precision CO2—because your plants deserve the best!

PRECISION CONTROL - Regulator valve lets you dial in CO2 output for lush, vibrant plant growth without guesswork.
COMPACT POWERHOUSE - Mini CO2 kit perfect for aquariums up to 15 gallons—ideal for stylish nano tanks.
EFFICIENT DIFFUSION - Ceramic diffuser maximizes CO2 absorption, ensuring every bubble nourishes your plants.
SEAMLESS INTEGRATION - Includes bracket and hose for sleek, secure installation that complements your aquarium setup.
STARTER FRIENDLY KIT - All-in-one package with cartridge, diffuser, and accessories—your gateway to thriving planted tanks.

The Hagen FL Mini Pressurized 20g CO2 Kit is a compact, easy-to-use CO2 supplementation system designed for planted aquariums up to 15 gallons. Featuring a precision regulator valve and an efficient ceramic diffuser, it ensures optimal CO2 delivery for healthy, vibrant aquatic plants. The kit includes everything needed for installation—regulator, cartridge bracket, disposable CO2 cartridge, hose, and internal diffuser—making it an ideal starter solution for nano tank enthusiasts seeking professional-grade plant care.

Specifications

ASIN	B0049RL3H4
ASIN	B0049RL3H4
Allergen Information	Nut Free
Best Sellers Rank	#205,295 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,568 in Aquarium Water Treatments
Brand Name	Fluval
Customer Reviews	3.9 3.9 out of 5 stars (832)
Date First Available	August 18, 2004
Global Trade Identification Number	00015561175401
Included Components	HAGEN FL MINI PRESSURIZED 20G CO2 KIT
Item Form	Gas Cylinder
Item Type Name	HAGEN FL MINI PRESSURIZED 20G CO2 KIT
Item Weight	11.52 ounces
Item model number	A7540
Manufacturer	Rolf C. Hagen (USA) Corp.
Manufacturer	Rolf C. Hagen (USA) Corp.
Manufacturer Part Number	A7540
Model Number	A7540
Number of Items	1
Number of Packs	1
Pet Type	Fish
Product Dimensions	2.7 x 5.4 x 8.1 inches; 11.52 ounces
Target Species	Fish
UPC	015561175401
Unit Count	1 Count
Warranty Description	Manufacturer Warranty

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.