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

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.

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

My son accidentally broke two of the glass test tubes that came with the ammonia and pH test kits. Just when I needed it most, I had nothing. The pandemic made it worse, where Petco and PetSmart were always out of stock. So, I made sure that I ordered a set of 24 in case of more accidents. The glass is not that thick but sheer so that you can make a good color reading which is important. Im skeptical about using the plastic bottles because Im not sure how clear they would be to make a good reading. Plus, I prefer glass for the share visibility. I wish the glass was more durable though, because the cleanup SAR another issue, tiny glass pieces can be missed and end up in your Barefoot. Ouch! Overall: good for sheer visibility color check. Value: could be cheaper as glass always needs to be replaced when broken.

when you have multiple tanks and want to do all the water tests all at once. these are a must have!

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.

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.

Two original tubes were broken during the tests. I hope these last much longer. Good price.

I have too many tanks and like to test them all at once so I needed more test tubes. Came intact and just the same as the tubes I from the freshwater master test kit.

Great quality and every fish owner must have because the one came with test kits break very fast. I love this product.

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