Rhinox CO2 Proof Tubing, for Aquarium CO2 Diffuser Planted Tank, 50 feet

It’s a bit too think to fit through caps and too loose internally to keep check valve water tight. Great quality tubing.

This was a decent enough price for this tubing, but it's really stiff & that might be OK, except if you need to bend it, sometimes it just kinks up & nothing can get through it. I'm taking their word for it that it's co2 safe, too. Seems like almost everything they have comes from China, & ya just never know if it can be trusted. Other than that, so far it seems to be working just fine, as long as I cut enough off to be able to make gentle bends so it won't kink.

This is heavy-duty thick-walled tubing! For something like hydroponics, pressurized trickle applications, etc., it should be great. However, FOR AN AQUARIUM . . . IT'S NEARLY USELESS. Too large outside diameter to fit through airline spacers, too large of internal diameter to fit securely on standard airline fittings/pumps, and too stiff to bend less than 10-12" diameter corners. Even if it fit snugly onto standard aquarium airline fittings, you would have to use a 90* fitting at every turn. I'm sure it's a great buy - I wouldn't have tried it otherwise. For my aquarium room, though, it simply will not work.

I like how sturdy the hose it, I had to run it down in my basement joists and that soft stuff just wouldn't have worked

Doesn't fit standard aquarium valves, connectors and such. Too big. Says it doesn't kink but it kinks easily. It's flimsy as well. Don't recommend.

Just the right diameter to hold a scented cotton swab for canine nosework and fit securely into the small suction cups for the new AKC buried searches. Easy to cut to proper length. Opaque, so only your dog knows where the scented article is.

Does not fit standard aquarium airline fittings. Inner diameter is too large does not form airtight seal. Very rigid kinks too easily. Do not recommend

Great product...packed and delivered with quality and care