FZONE 2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (2.5 L with solenoid))

This is excellent. I was wary of complicated systems and setups but on trying this one its an easy mix of citric acid and bicarb and Ive had over a month of CO2 so far. Easy to set up and easy to adjust the bubbles per second. Has made a visible difference to my plants. Green and lush and visibly improved growth. You can put it on a timer easily with the included solenoid. The bottle is top quality too. Excellent set up and super glad Ive added this system to my tank.

After carrying out a lot of research I decided this system would be the best bang for bucks system for my 120L system. I've been running the generator for 3 months now and I'm really impressed with it. It was easy to set up and the raw ingredients are cheap and easily purchased from Amazon. The powders are added and then the water is added very slowly with the bottle at a 45 degree angle. pouring it slowly slows down the chemical reaction and stops you wasting gas as you screw the regulator on to the bottle. I was getting 2 weeks of CO2 from one charge and when I added a CO2 reactor that figure went up to almost 4 weeks. 4 weeks of CO2 from 200g of acetic and 260g of Bi Carbonate is in my opinion amazing. The regulator is easy to adjust and the solenoid valve works as it should. The kit itself contains everything you need, except the raw materials and a drop checker. These can be picked up cheaply from Amazon. CO2 has made a big difference to my plants and algae growth is virtually zero now. This kit has been the best piece of kit I have bought for my aquarium in a long time. If you want to add CO2 to your system this is a great straight out of the box solution.

This is the second FZONE system I have ordered not because the first one was faulty but a second one gives me the of having a pressured system ready to swap immediately the working tank empties. The system is easy to install and use on a daily basis and is easy to clean after each recharge. There is no smell from the unit and appears to be of a high quality that will last. It has been connected to my 250l tank for four months now with no issues. The solenoid is controlled by a PH controller and, with the use of a smart plug switches CO2 injection off at night. This is important as the plants do not use CO2 at night so there is a chance of gassing the fish if it were to run with the lights off. Plant growth is certainly improved and I am now able to grow some stunning specimens of Red Tiger Lilies with some off shoots achieving a height of 18 inches in around a week. The biggest effect is on invitro plants that can double in size in a 24 hour period.

This was the first time I have added CO2 to my planted tank ,thought long and hard before deciding to go for Fzone 4lt CO2 reactor also watched a lot of you tube videos about CO2 reactors,some good videos of the unboxing and set up of this set .This came packaged well with everything needed for set up This was quite easy to set up for a beginner, instructions could be better but are ample ,canister looks well and the regulator good, loads of CO2 tubing and suction cups also ubend for attaching to tank if required,diffuser supplied as well, cannot comment on diffuser as bought different one due to some of the comments on other reviews ,it also comes with solenoid for for running a CO2 schedule you need to buy your own smart plug or timer switch for this ,you also have to buy your own ingredients for making CO2 ( baking soda and citric acid ) There also seems to be issues with the amounts of each to be added ,some good videos on YouTube regarding this. I have now had this set up and running for more than one week all is working well pressure is good solenoid is working well ,only running for 7hrs a day on a 168 ltr tank ,running at 2 bps and have not had any problems at all I would recommend this for someone thinking about using CO2 in their planted tank I think this is good value for the money will update this review at a later date regarding how long cannister lasted , PS plants are loving CO2 and growing well . You will need to buy your own CO2 drop checker and fluid and this is safest way to monitor CO2 amount.

The cheapest way as far as im concerned when introducing Co2 to your tank. This is so easy to set up, I purchased this item about two weeks ago and found the diffuser not very good so removed it and purchased an inline diffuser fitted to the outlet pipe close to the filter as possible. I also have the solenoid on a timer so its not running 24hrs, this is a must so you dont hurt your fish. Im running at one bubble every five seconds for eight hours and it works for me and *dont forget to purchase a drop checker*.

Lovely looking bit of kit, looks good along side the tank. Silent with no smells or leaks. Very easy to put together via YouTube videos and the mix is a breeze. For the 4L version, the optimum mix is 600g citric acid, 780g of baking soda and 900ml of tap water. The funnel and mixing cups that come with this are way too small so I ordered larger sizes for ease of use. The solenoid works flawlessly and the regulator seems good quality too. Co2 was produced through the diffuser in minutes. However a tip here. It takes around 24 hours for the pressure to reach correct operational pressure. I checked on it next morning to find it was releasing far too much co2 into the tank because the pressure had increased overnight. After tho it has settled into a consistent co2 injection. Another tip is to buy a co2 drop checker, which when positioned correctly in the tank gives an accurate indication of co2 levels for plant growth and fish safety. I've also ordered a better diffuser from Amazon which is meant to produce the smallest bubbles. Though to be fair the one the kit came with is perfectly adequate. First time co2 user so hoping to see a vast difference in plant growth and health.

I took a while to decide on what would be the best CO2 system for my tank and settled for one where I did not have to keep buying replacement canisters and I could buy the ingredients cheaply on Amazon. I have now been using this for a fair few months and it has been a great addition to my planted tank. It was very easy to set up and with the addition of a couple of YouTube videos made it even easier. The size of the canister is not too large but I still need to think of a way to hide it. Make sure that you put the plastic tubing into hot water first so that you can get a good seal on all the components and you should then have no leakage of CO2. I did buy a different diffuser from Amazon as that seemed to be the only weak point but through my research I knew this beforehand.

Wouldn't recommend at all. Barely a month in of using and the solenoid has already stopped working. Avoid.