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

Great product. Arived on time and with no damage. All the tubes arived not broken. Highly recommend.

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.

Product is exactly what is described. Delivered with nothing broken, packaged well. No matter how careful things occasionally break. I wanted a few more tubes to replace 2 I had broken and also wanted to be able to test multiple tanks without having to clean in-between. I hesitated at the price, did I really need 24? But it made more sense to just get the 24 than just getting 3 or 6. Glad I did, made testing much simpler.

I have the API Freshwater Master Test Kit, which comes with 4 test tubes. I do test for all five parameters on my potentially overstocked tanks before and after water changes. Having these extra test tubes makes it easier for me as I do not have to wash out my test tubes as I am conducting my testing on my tanks. Also, I have a before and after standard available to me for straight comparison. I tried using various vials and such (free stuff) to do my water tests, but the colour comparison with the API chart is best visible using API standardized test tubes. I would recommend that every aquarist/fishkeeper get themselves a set of these test tubes. Makes life a lot simpler.

I have 3 test tube holders so I can hold 24 tubes. Sucks to have to wash tubes during a session of multi-tank testing. Do all the testing, was all the tubes. Easy.

Very helpful when you have more than one tank!

Needed more than just the 4 tubes included in the master test kit. This was exactly what I needed!

Only one came broken, but the rest were okay! Looks exactly like the ones that come from the api water test kit. But to spend over $20 for 25 test tubes is a lot.

Who needs this many? 4 packs or even 8 packs sure.

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