The needle valve isn't very good. The bubble count drifts often. Is there a way to manage this? Or change out for a better needle valve?

I don’t have that problem with either of mine. The needle valve is a secondary regulation device. Try adjusting the primary regulator valve down. This will reduce pressure to the needle valve.

I just set up the regulator. But i see that even with the power off, bubbles are coming out of the bubble counter. Is this normal?

No. That is not normal. The solenoid should shut off the flow completely. However, make sure you do not have the regulator pressure set too high. The regulator should be set to the lowest pressure that will allow bubbles to flow. Mine runs a little over 20 psi. If the pressure is set to high, the solenoid might leak.

what size wrench do i need to tighten this regulator onto the bottle of co2?

I just use an adjustable monkey wrench on mine. You don’t have to tighten it incredibly tight.

would I need a stand-alone check valve when using this regulator with an inline diffuser?

The manufacturer says the bubble counter has an integrated check valve. So no. But I would!

Fz Pro Dual Stage | Desertcart Finland

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 325.18

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

🌿 Elevate your aquarium game with precision CO2 control that keeps your plants thriving and your setup flawless.

BUILT IN SAFETY FIRST - Automatic pressure release valve activates above 100 PSI for worry-free use.
TAILORED OUTPUT PRECISION - Adjust pressure from 0 to 65 PSI to perfectly suit your aquatic plants’ needs.
UNSHAKABLE PRESSURE CONTROL - Dual-stage design guarantees steady CO2 flow—no more surprise tank dumps.
QUIET ENERGY SMART OPERATION - 12V DC solenoid runs whisper-quiet and saves power, ideal for 24/7 automation.
DOUBLE THE AQUARIUMS DOUBLE THE CONTROL - Two independent manifold blocks let you manage one or two tanks seamlessly.

The FZONE Pro Dual Stage Aquarium CO2 Regulator CGA320 offers stable, adjustable CO2 output with a dual-stage pressure system and modular manifold blocks for managing one or two tanks. Featuring a quiet, energy-efficient 12V DC solenoid and built-in safety valve, it ensures precise, reliable CO2 delivery tailored for North American CGA320 cylinders, making it a top choice for serious aquatic plant enthusiasts.

Specifications

ASIN	B0838KXK5D
Best Sellers Rank	#48,200 in Pet Supplies ( See Top 100 in Pet Supplies ) #134 in Aquarium Air Pump Accessories
Brand	FZONE
Brand Name	FZONE
Customer Reviews	4.3 out of 5 stars 664 Reviews
Item Form	Gas
Item Highlight	Expandable Manifold, Adjustable Pressure, DC Solenoid, Durable MetalBuild, Integrated Precision Needle Valve, Bubble Counter
Manufacturer	FZONE
Model Number	2020pro
Number of Items	1
Pet Type	Fish
Target Species	Fish
UPC	764595878757
Unit Count	1 Count

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€ 325.18

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered 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 Finland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The delivery time was excellent, and the packaging was secure.