Got mine hooked up but the blades inside are not moving at all. CO2 just accumulates at the top. How do I get blades to rotate?

Sanding as described is a good idea ( I used 800 grit wet/dry). But the real problem is probably inside the water inlet tube where it enters the reactor body. Look into the water inlet tube; the opening at the reactor body should be perfectly round and there shouldn't be any plastic material protuding into the opening (it's particularly bad for propeller rotation if any excess material is protruding into the flow at the outside edge). My unit had about 10-15% of the diameter blocked at the outside edge - a small rat-tail file took care of that and the propellers-not-rotating-problem too. When reassembling the reactor, don't push the center tube assembly in tight - just far enough to mate the center tube with the water outlet. Then let screwing on the bottom cap push the center tube assembly into its final position. Both propellers should rattle freely after assembly. Good luck.

Does this size reactor bring two suction cups like the smaller version?

Yes mine had 2. About a foot tall. Worked good.

I see thats its mentioned they fit both 12/16 and 16/22mm, But I want to know if its 16/22mm with standard without an an adapter

The larger diameter is supported via really crappy adaptors. It will restrict flow very significantly.

Will this work with an air pump instead of a canister filter?

this works with a canister filter, but not an air pump.

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🌿 Elevate your aquarium game with 100% CO2 absorption—because your plants deserve the best!

BUILT TO LAST - Durable, acid-resistant materials withstand impact and simplify maintenance.
HASSLE FREE SETUP - No tools needed—intuitive assembly with clear diagram instructions right on the box.
SPACE SAVVY DESIGN - Compact form factor fits seamlessly inside or outside your aquarium setup.
POWERFUL COMPATIBILITY - Optimized for pumps ranging from 250 to 500 GPH, perfect for large planted tanks.
MAXIMIZED CO 2 EFFICIENCY - Patented impeller design ensures zero CO2 bubble loss for lush, vibrant aquatic plants.

The Gulfstream Tropical AGU00529 Ista Max Mix CO2 Reactor is a large, compact, and durable aquarium accessory designed to dissolve 100% of CO2 into water using a patented impeller. It fits pumps from 250 to 500 GPH, requires no tools for assembly, and is resistant to acidity and impact, ensuring efficient and maintenance-friendly CO2 diffusion for thriving planted tanks.

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