API Replacement Test Tubes for Aquarium Liquid Test Kits, 24 count

Rated 4.5 out of 5 stars
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API Replacement Test Tubes for Aquarium Liquid Test Kits, 24 count slide 1 of 6
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API Replacement Test Tubes for Aquarium Liquid Test Kits, 24 count slide 1 of 6
$23.95Chewy Price
$37.29Chewy Price
$22.75Autoship Price
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About This Item

  • Every purchase comes with 24 test tubes and caps to replace lost or damaged tubes.
  • suitable for use with all aquarium water testing kits.
  • Clean, undamaged test tubes are an essential tool for keeping aquarium conditions healthy.
  • Dirty test tubes can alter water test results, making them less accurate.
  • Test tubes with cracks or other damage can leak or harbor bacteria which can also lead to inaccurate test results

Check out API's master test kits to help keep your freshwater, saltwater or reef aquarium in tip-top condition.

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Fish TypeTropical Freshwater, Marine Fish, Koi & Pond Fish...Marine Fish, Marine InvertebrateMarine Fish, Marine InvertebrateTropical Freshwater, Cichlid, Goldfish, Betta, Bottom FeederMarine Fish, Marine Invertebrate
Aquarium TypeFreshwater, Saltwater, PondSaltwaterSaltwaterFreshwaterSaltwater

Questions & Answers

2 Customer Questions

What is the proper way to clean these test tubes after each use?
Answer by ChewyJun 24, 2018
The tubes can be cleaned with hot water and air dried.

What size (dimensions) and capacity are these test tubes?
Answer by ChewyAug 10, 2021
The test tubes are meant to hold the water testing sample of about 5 milliliters (some rounding occurs here) marked with an indicator line and will hold 2-3 more milliliters if they are filled to the very top. The test tube is 12-13 millimeters in diameter and 85 millimeters in height. Using test tubes of different specifications with API reagents is not advised, for accuracy purposes.

ReviewsWrite a Review

Rated 4.5 out of 5 stars
8 Reviews
Would recommend to a friend

8 Customer Reviews

Rated 3 out of 5 stars
By Steve on Jun 9, 2021

Fragile Product...Sub-par Packaging

The extra supply of test tubes is much appreciated. However, the box the tubes were in had no cushioning whatsoever, nor did the shipping box. The tube box had opened and the tubes were scattered in the shipping box. Surprisingly only one tube was broken. The shipping box also contained an LED clip on aquarium light. I still recommend the products, but was disappointed in the lack of cushioning, both from API and Chewy. I still would order again, though. Just hope for better packing.

Rated 5 out of 5 stars
By Stacy on Sep 30, 2020

Great service

I trust Chewys for all my pet needs. It only takes a day or 2 for my orders to ship. I don't get charged till the items are on the way. I like that I can order prescriptions, and I love the way they keep me informed about the products and services. Buying at their phone app is so easy to navigate thru.

Rated 5 out of 5 stars
By Jenny on Nov 23, 2019

Test tubes for life

All intact! More test tubes than I even thought I needed.

Rated 5 out of 5 stars
By Delilah on Oct 14, 2018

When you have cats...

Replacements are necessary. My furry little friends love to knock over my test tubes...I now have a test tube rack because I was afraid they’d go to jump off the counter and come in contact with the broken glass! These are literally the same test tubes you get in the API test kits so I’m very happy to have them.

Rated 3 out of 5 stars
By BassetMom on Jul 13, 2018
Top 250 Contributor

Nice to be able to replace broken tubes

The second time I used my API kit I broke a tube. I got these and it has helped to have extra tubes on hand. I can also test all my tanks and then clean all the tubes instead of between each tank. It would just be nice if it wasn't so easy to break the tubes.

Rated 5 out of 5 stars
By Halfpint63 on Jun 4, 2018
Top 1000 Contibutor

Great Replacements

Accidents happen and it's always great to have these extra testing tubes on hand. Besides using them for Test Kits, I use them to store my Frozen Foods for the Marine Tanks and Freshwater Tanks, makes using the pipettes so much easier for proper doses.

Rated 5 out of 5 stars
By BonnieBlue on Sep 22, 2017
Top 100 Contributor

Delighted they have replacements tubes!

So glad I did not have to buy new test kits just to replace old tubes! This is a winner!

Rated 5 out of 5 stars
By Pepper on Sep 18, 2017

On line order

My order came quickly, and since they were glass tubes..unbroken!