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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🌊 Dive into Efficiency with Fzone!

PRECISION CONTROL - Achieve accurate CO2 injection with our high-precision needle valve and built-in bubble counter.
24 7 CUSTOMER SUPPORT - Enjoy peace of mind with round-the-clock assistance from our dedicated customer service team.
SMART POWER MANAGEMENT - Utilize a 12V DC solenoid on a timer for customizable CO2 injection schedules.
EFFICIENT CO 2 GENERATION - Generate CO2 for up to 1 month at a steady 1bps with just 300-400g of raw materials.
THICKER STRONGER LONGER LASTING - Experience the durability of 1.5mm SUS304 stainless steel, 25% thicker than competitors!

The Fzone 2.5 L Aquarium CO2 Generator System is a robust and efficient solution for aquarium enthusiasts, featuring a durable SUS304 stainless steel construction, precise CO2 control, and a user-friendly design that ensures optimal plant growth in your aquatic environment.

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