API Replacement Test Tubes for Aquarium Test Kits 6 Pack Bundle

API tubes work, but they are a pain. Theyre made nice, but are poorly designed. Thy are thin and break easily. Theyre too narrow, and fall over all the time. The caps dont close properly. When you remove the caps liquid always drips down the outside of the tube, so titration tests are a mess. If the test requires much shaking you end up with chemicals leaking out, even if you hold them tight. Im not sure about the accuracy of the 5mil marking. If I fill them with a syringe 5mil is always a bit higher than the mark (the bottom of the meniscus is clearly above the line). It may be accurate for freshwater, IDK. It probably doesnt matter as long as you use the same method each time, but you would like everything to be precise. Titration tests are A LOT easier in a container that is wider and that you can swirl.

great. just like original

When I do weekly water changes, I like to check the levels of everything in my tanks. Seeing as I have 5 tanks, there was not enough vials to go around in the Master Test Kit. I ordered a few of these and problem solved. They have held up well over a few months, except for when dropped. They like to break when dropped onto anything other than carpet, but they’re glass so I’m not really too surprised by that.

The original description showed 12 test tubes. I had it saved in my cart and when I purchased it, they changed it to 6 tubes. They also came in bubble wrap, no original packaging … very fraudulent and unfair to change the item description after purchase. It’s false advertising

These did not come in a box. They arrived in bubble wrap with one broken into a bunch of tiny pieces. The glass is very thin similar to the ones in the testing kits. They break VERY easily. Would not buy again.

This came very poorly wrapped. Luckily nothing was broken but I purchased a 12 pack for this price and Amazon changed the description to 6 once it arrived. The price point on this is ridiculous. I would not have paid over $12 for 6 test tubes only. Also item arrived 2 days after the original promised date.

I got these because I broke some of my other tubes. Would recommend

Exactly the same tubes you get in the kits. I was a little worried about shipping because they came loose and alone in a bubble mailer. But they all arrived intact.

Exactly the same as original API tubes

Great