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

I had a hard time getting my biofilter started. I had to buy the API test hit with the tubes and had broken two tubes and basically, you need 5 tubes to do all the tests.

Real thing

I use the api master test kit often and the tubes and lids that come with the kit work perfectly. For some reason with the replacements the lids don’t seal properly and when you shake them to perform your test the liquid comes sloshing out. At least two of the test solutions can cause corrosion to metals and can cause both skin and eye damage. I don’t really see how these are safe to use. I also can not see how the test can be accurate as you are losing both tank water and test solution with every shake.

The glass is really clear (not cloudy like some other brands) and its great that the level line is marked off (makes measuring the amount for water tests super foolproof). I also bought some cheap plastic pipettes so that I disturb the tanks as little as possible, but more so because its really easy to fill up these tubes to the line with the precision of a pipette. The caps fit snugly and Im never worried about any leakage while shaking up the chemicals with the water during testing. To clean, I just run it through some warm water after Im finished with the testing and the tubes are as good as new again. Great product and I love testing my aquariums water quality with this more precise method.

They are standard thinwall flat bottomed round 5 ml glass test tubes with plastic cap, that you find in the API test kits. If youve lost or broken a few in your test kits, or have more than one system to test, its nicer to have extras. Only fault is the box is very thin flimsy postersheet type cardboard, and in Amazon fulfillment, the other contents of the box shifted and smashed a few. I didnt deem it bad enough to go through return and replacement but do be warned, the boxful as is is pretty fragile, so if you need a full 24 you might end up a few short with one box. They will also work with the Tetra tests, anything that needs a 5 ml water sample, they will work.

I thought I only needed a handful, but ended up needing over 3 times as many test tubes for testing aquarium water. So, having the large pack with extras was perfect and suited me perfectly. Same vials that come in test kits.

I got exactly what I ordered}. The product description maches with what i received

I dropped all of my test tubes and they shattered, I bought this as a replacement, they are the EXACT same tubes (with 5 mL mark) that come with all API test kits, caps included

I needed these SO BAD (and will probably need more again soon). The glass tubes just break so easily, and its REALLY HARD to find more! I got this larger box, and everyone around me wanted to buy just a few off of me! We ALL needed them!

These are the same quality as the original API Water Test Kit for my aquariums so watch out as they will break in the same way as you broke your original ones which is why you will be looking at buying this to have extra ones on hand!