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!

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🔧 Elevate your aquarium game with precision CO2 control — because your fish deserve the best!

DUAL AQUARIUM READY - Two manifold blocks with precision needle valves let you control CO2 flow independently for multiple tanks.
PREMIUM COPPER BUILD - Crafted from pure copper for unmatched durability and thermal conductivity over aluminum.
BUILT IN SAFETY PRECISION - Automatic pressure relief valve activates above 100 PSI; bubble counter precision up to 1 bubble/3 seconds.
WHISPER QUIET ENERGY SMART - DC 12V solenoid valve offers silent operation and low power consumption, perfect for timer integration.
CONSISTENT PRESSURE ZERO SURPRISES - 2-stage regulator ensures stable output regardless of tank level, preventing EOTD disasters.

This CO2 regulator manifold block features a 2-stage adjustable output pressure (0-65 PSI) for consistent gas flow, constructed from pure copper for superior conductivity and durability. It includes dual manifold blocks with independent needle valves, enabling simultaneous control of two aquariums. The DC 12V solenoid valve ensures quiet, energy-efficient operation compatible with timers, while built-in safety valves protect against overpressure. Ideal for freshwater tropical fish tanks requiring precise CO2 regulation.

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Pet Type	Tropical and Aquarium Fish
Item model number	2020pro
Is Discontinued By Manufacturer	No
Outer Material	Stainless Steel
Inner Material	Stainless Steel
Color	Silver
Number of items	5
Specific Uses	For freshwater
batteries required	No
Batteries Included	No

CO2 Regulator Manifold Block Branchable Speed Controller Solenoid Valve with Bubble Counter for Large Cylinder

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