Gulfstream Tropical AGU00512 Ista Co2 Diffuser Set for Aquarium

It is very easy to install and you can see the benefits in a few days. It keeps the plants with a vivid color and make them grow tall.The design allows you to control the level of CO2 inside the diffuser and consequently inside your tank, holding the plants growth if you want to.

The can last about 2 or 3 days and it does absolutely nothing for your plants. Complete waste of money

Easy to use, no real instructions. For clueless people like me, the little yellow thing with the arrow...arrow should point toward aquarium. It is the valve that stops the CO2 from leaking back out. If you can not see the arrow, blow into each side, the side that allowed air through, place the end you blew into on the can side. If you got it right, it will fill up.Now, my experience with these. I've used them for a few months now, saw no real growth but nothing died. I do think it helped and so easy to use. Bought 10, some diffusers do not hold CO2, none of them stick after a few weeks. Dumped all the CO2 into the tank at once! Thought all fish would die...no reaction. Happened in two tanks twice without me touching it, suction fails. I thought for sure large amounts of CO2 would kill fish. It's not like the cans are full of air. So no worries if this happens to you. I took heater suction cups, clipped the tongs off it and tied the diffuser to it, works great now. I am hoping to see a difference soon.UPDATE: USED FOR OVER A YEAR...same cans...why??? So bought 10 and 80% of air valves (yellow things) Visibly leaked. So replaced. Containers now stay full minus 1/4 inch for months. Nothing happens..in 10 different tanks. The ones with the yellow valves will go in about a month..why? I imagine they have a slow leak. No change in plants, any growth would be due to fert using. This does nothing, probably why dumping a full load in the water all at once did nothing to fish or pH. Try replacing valves that leak and using no fert and see how well the system works.

I HAVE A 30 GAL. If you need a lot of CO2 this is not the right product as a permanent thing is good for a started but later get a big CO2 and keep using the diffuser is awesome... even if you have a 55 get two diffusers to be able to do the good thing without losing too much CO2!! In my tank is perfect because I only going to need it for a while until I have all the livestock that I want.AWESOME PRODUCT but the cap of the diffuser for let the water in needs to be better because sometimes a little bit of co2 escapes from that tinny whole because I can see the bubbles but after you pressure a lot without breaking it it stops.Great idea and easy to use but need a adjust on the cap of the diffuser maybe instead of pushing it will be better turning it like a valve of the air pump style... just saying..

I have a small 5 gallon planted tank and didn’t want to add pressurized co2 to a small tank, so I bought this. Works as described. I’m getting great growth since using it. I would recommend getting a better check valve as the one included allowed gas to seep out.

I have had this simple CO2 system for about a month already, filling up the CO2 diffuser chamber once a day. It works, but not as I expected. You have to manually feed CO2 into the diffuser by pressing the top of the aerosol can, once filled, you let it sit and in a couple of minutes most of the CO2 would be absorbed by the water. If your lucky enough it might just work for you. I have this set up on a 5 gallon planted tank, but it's not working out for me. You're much better off saving up your money and just spending it on a paintball CO2 system.

Having used co2 for my aquariums for some time, this product looked funny to me. The price was good so I gave it a try! Wow! It did just as good as any other simple co2 system. Some as much as 4 times the cost. Everythings included, and it lasts a long time. Plug and play! Took 2 minutes to set up. Perfect for beginners and pro's with a small tank waiting to bloom. Buying more, maybe even losing some of the more bulky systems with similar diffusion .

I’ve been using this for two weeks and my CO2 checker doesn’t change at all. It’s a 5 gallon tank so it’s not like I am using this on a giant tank. I will return.