Fluval Disposable 3.35 oz CO2 Cartridge (3 Pack), 17559

I do not think that this is an actual good source of CO2 to a tank If you turn it up high enough to allow any kind of CO2 checker to register that it's going to significant amount of CO2 in it It will run out in 3 days but I turn the volume down really really low just to give CO2 to my tank and it will last for 6 to 7 weeks

I bought a used 88g CO2 kit a few weeks ago and my first cartridge was almost empty. Ordered these and originally had a lead time of one week. The cartridges showed up in two days, just in time to swap out the empty one. Best of all, the 95g cartridges fit the 88g kit perfectly.Probably cheaper in the long to invest in a larger CO2 system that you can refill, but these are very convenient for adding CO2 to a smaller tank.

These are really way to expensive for how long they last. I have my defuser for my 10 tank set to a bubble every 2-3 seconds and it is off at night. Went through the first tank in two weeks. Easier and cheaper in the long run to just get a 5lb or 10lb tank and regulator kit.

First time i use the kit it the co2 cartridge lasted like 1 month now i order these 3 pack cartridges which is extremely over price fluval get with the program it last only 1 day discovered there a leak in the valve area where the cartridge must be threaded. Dont buy people waste of money. Word of advise just biy diy co2 worth the money last many months no thanks fluval try harder

looks great. fantastic addition to the plants growth cycle. Plants are seriously thriving from this co2 injection kit

I use Fluval CO2 canisters in my 3 aquariums of different sizes and the plant growth under the right lighting has been nothing short of amazing!

works well, but way over priced

To small. Need bigger.

While I wish they were cheaper, so I run the CO2 much lower than I'd like, these are great replacements for the Fluval system. It's good enough for smaller tanks, but it may be cheaper in the long run, to go bigger.

Ideal for a small planted aquarium. Bought 2 sets only lasts a short period of time so I set mine to 3 hours per day. Follow the instructions and check all connections for leaks . But as I say don't have them on all day because they won't last ( the seller is excellent)

Only 1 workedThe other 2 leaked emptyWaste of money

I usually purchase these from CO2 Supermarket. These Fluval ones are cheaper and have slightly more CO2 in them. Perfect - hope they carry on being available.

easy to fit