API REPLACEMENT TEST TUBES WITH CAPS For Any Aquarium Test Kit Including API Freshwater Master Test Kit 24-Count Box

Good value and quality.

I’m clumsy and break my tubes, these are a good replacement tube.

If you use the API test kits then you may want to get these to go along with it. These are simply replacement tubes for the API kit so they are the exact same as what comes in the kit (clear tube with a 5 ml mark and a cap). And since they are somewhat fragile you will eventually need some replacements. Also helps out to have multiple test tubes if you are testing multiple tanks at once, in my case, 6. Its a lot easier filling a bunch of tubes at once for testing than using, rinsing and reusing the same few tubes over and over for one batch of tests.

I use these in my college-level science lab - because they have a flat bottom, you dont need test tube racks! They are small. If you need large tubes, these wont work. We use them for water analysis, and they are great.

of course these are great but I (or anyone I know) would ever need 24?! Should really make a smaller box. I only wanted a few extras since I broke one of my own. Also there was no bubble wrap around them. This box was thrown into a large amazon box. I have no idea how none of them managed to break.

Pretty good for the amount of test tubes you get for the value but some of them leak when you shake them

I have eight tanks I need to monitor weekly so the box of 24 is perfect to test all levels. Theyre identical to the ones provided in the master test kit and have easy to clean and remove plastic caps.

I love these. Ive broken so many by dropping them on a tile floor and decided to buy this instead of more test kits and it was absolutely worth it. You should pick up the test tube rack as well because that makes doing water tests all that easier. You can also test your pool with it too if you want. I do just because I can. Two different tests are better than one right?

Master kit comes with the tubes, but I seem to break them every time.

The picture is not what I got. What I got was the API testtubes which I am happy with. They are the exact same that came with all the API tests that I already have. And to make your life easier if you have a bunch of these get one of these: Karter Scientific 208V2 Plastic Test Tube Rack for 12/13mm Tubes, Holds 50, Detachable Its a perfect fit.