Name: Aquarium CO2 Reactor V4 by ARC
Brand: Aqua Rocks Colorado
SKU: arc-co2-v4-12
Price: 129.99 USD
Availability: InStock

$129.99

Shipping calculated at checkout.

Size

12mm - 1/2in Connectors

16mm - 5/8in Connectors

19mm - 3/4 in Connectors

25mm - 1 in Connectors

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Backordered, shipping soon

ARC CO2 Reactor — Version 4

Our most refined CO2 reactor yet. Version 4 features a single universal body size engineered to perform across all tank sizes, with a selection of connector fittings to match your exact plumbing setup.

What's New in V4

Universal body: 8" diameter × 19" tall (excluding connector) — one size fits all tanks. Minimum is 30 Gallons and above
Adapters range from 2–4" depending on fitting size selected
Available connector sizes: 12mm (½"), 16mm (⅝"), 19mm (¾"), and 25mm (1") for Fluval FX series
Minimum pump requirement: 250 GPH (dedicated pump can be added as needed)
Includes a bottom mesh tray for K1 media use
Built-in close valve — doubles as a pre-filter when loaded with K1 media

Connector Size Guide

Connector variants: 12mm (½") or 16mm (⅝") 16mm (⅝"), 19mm (¾"), or 25mm (1") connectors

Installation

Full installation instructions are available on our YouTube channel. Hose clamps are not included.

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