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The ISTA Max Mix CO2 Reactor’s patented impeller design fully dissolves CO2 with zero waste, compatible with external and canister filters.
Elimate CO2 waste and provide high dissolution rate

What it is. An inline CO2 reactor, Medium size (ISTA item I-528), that sits in the filter return line and mixes CO2 into the water flow using an internal impeller rather than relying on passive diffusion.
Flow rating. Rated for roughly 95 to 264 US gallons per hour of filter flow through the reactor. Run it well outside that range and the impeller can’t fully dissolve the gas.
Why a reactor over a diffuser. The patented impeller design is built to dissolve CO2 completely as water passes through, rather than letting some of it escape as visible bubbles at the surface. That’s the main efficiency gain over a standard ceramic diffuser.
Compatibility. Plumbs into the outflow of an external or canister filter.
Build. Durable, acid-resistant material chosen to resist the deformation that constant CO2 exposure causes in lesser plastics.
This product is covered by warranty as per the manufacturer policy, against material and manufacturing defects from the date of purchase.
Warranty support is handled by us directly. Message our WhatsApp support with your order number and we will diagnose the fault first. Most cases are solved by replacing a single part, so you rarely need to send the whole unit. If the item does need to come back, it ships to our Delhi or Pune warehouse, whichever one served your order, and courier cost in both directions is borne by the customer. Your GST invoice is valid proof of purchase for the claim.
Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.
If your item arrives defective or damaged, message us on WhatsApp with your order number, or email us if you would rather, and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 48 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.
Full terms are on our Cancellation & Returns page.
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