What is the reason for needing a solenoid? How will the system run without one?

The solenoid will control the co2 output. When turn off the solenoid, there will not be co2 out from the generator. If without the solenoid, the co2 will keep output.

How long do I have to wait before using the set up in my tank?

You can use it as soon as the needle is in the green.

How can i replace the needle valve. Mine is broken alternating between full throttle or 0?

This isn’t a replacement part for the co2 generator it’s valve for a co2 tank. I recommend contacting the manufacturer.

For a 4l co2 generator, should i put in 600-800 gram each of material a&b? also do i pour in 300ml water or more? i've read different opinions online.

I use 600 ml for the material each and 800 ml of water I freeze the water in try"s that make long round ice cubes the cube are made to put in water bottles

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Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks

Product ID: 513184979

Details

Brand
FZONE
Item Weight
2.36 Kilograms
Liquid Volume
2.5 Liters
Manufacturer
FZONE
Unit Count
1.00 Count

⏲️12V DC solenoid with timer control for customizable CO2 injection

⚙️Precision needle valve & bubble counter for steady 1 bps CO2 flow

🛡️1.5mm SUS304 stainless steel tank - 25% thicker durability

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Description

🌿 Elevate Your Aquascape Game with Precision CO2 Mastery!

SAFETY FIRST ALWAYS - Automatic pressure relief valve protects your system by releasing excess pressure, giving you peace of mind while your aquatic garden flourishes.
BUILT TO LAST BUILT FOR GROWTH - Robust 2.5L SUS304 stainless steel bottle withstands up to 80kg/cm² pressure, ensuring a month-long steady CO2 supply for thriving aquascapes.
SMART TIMER DRIVEN CO 2 INJECTION - 12V DC solenoid valve lets you schedule CO2 release, syncing perfectly with your aquarium’s light cycle to maximize plant health and energy efficiency.
EFFORTLESS DIY SETUP WITH EXPERT SUPPORT - Complete kit includes regulator, needle valve, and bubble counter; backed by 24/7 customer service to keep your aquascaping journey smooth and successful.
PRECISION CO 2 CONTROL AT YOUR FINGERTIPS - Fine-tune your aquarium’s CO2 output with the integrated needle valve and bubble counter, delivering consistent 1 bubble per second flow to optimize plant photosynthesis.

The Fzone 2.5L Aquarium CO2 Generator System is a professional-grade DIY kit featuring a 25% thicker SUS304 stainless steel bottle capable of withstanding high pressure for up to one month of steady CO2 output. Equipped with a precision needle valve and bubble counter, it ensures accurate CO2 dosing at 1 bubble per second. The included 12V DC solenoid valve allows timed CO2 injection aligned with your aquarium’s light cycle, while an automatic safety valve prevents overpressure. Designed for serious aquascapers seeking reliable, efficient, and safe CO2 supplementation to boost aquatic plant growth.

Specifications

ASIN	B0B5R18XDV
ASIN	B0B5R18XDV
Allergen Information	Tree nuts may contain
Best Sellers Rank	#45,077 in Pet Supplies ( See Top 100 in Pet Supplies ) #154 in Aquarium Air Pump Accessories
Brand Name	FZONE
Customer Reviews	4.4 4.4 out of 5 stars (977)
Date First Available	January 8, 2023
Global Trade Identification Number	00689323444083
Item Weight	2.36 Kilograms
Item model number	2.5 L
Liquid Volume	2.5 Liters
Manufacturer	FZONE
Manufacturer	FZONE
Manufacturer Part Number	2.5 L
Model Number	2.5 L
Product Dimensions	12.99 x 3.94 x 13.78 inches; 5.2 Pounds
Target Species	Fish
UPC	689323444083
Unit Count	1.00 Count
Warranty Description	1 year

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

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