Aquarium Choice CO2 DIY Reactor Bottle Cap: Quick Twist for Fish Tank, 6 Pieces with 118 Inch Long Hoses Review

, they work great for a DIY system I put together but don't over tighten the lids as they will only tear at the top. very cheap plastic

Well made they have an o ring in the cap the nipples are perfect what more can I say excellent quality product. Thanks very much!

Used to attach Artemia hatchery tubing without the need to drill and caulk holes. Works perfectly with smart water bottles. The only catch is that it doesn't fit in other small water bottles.

Works very well. I tried a rigged version which I didn't realize was actually badly sealed. It would be nice if you could cover one of the nipples, I just cut off a short piece of hose and filled it with hot glue.

The ladies in this photo (legitimate addition in Colorado), crammed so closely together, rely on the extra CO2 pumped into this tent. These covers allow me to build a system that I can control and install on multiple tanks. Coming soon to a system of 4 to 5 bottles.

These caps have proven to be excellent. I got them to build a baby brine shrimp hatchery for my fish room. I didn't use the hose that came with the kit because I already had the black hose I was going to use for this project. I'm so glad I found them, I couldn't build my BBS setup without them.

They work great with 2 liter soda bottles and smaller 16 ounce bottles for homemade CO2. they are cheaper than ebay. the same costs between 6 and 8 dollars apiece on ebay. It's good that they include an air hose, but that's not enough if you want to install 3 tanks unless the CO2 system is next to the tank and not on the floor. I didn't have enough to put 2 tanks. So you need more air line when installing multiple tanks.