These genuine API Replacement Test Tubes with Caps are designed for use with all API Liquid Test Kits. Made from durable, high-clarity glass, they offer accurate readings and long-lasting performance. Each tube is fitted with a secure screw-top plastic cap to prevent spills and contamination during testing.

Available Options:

• API Test Tube x1
• API Test Tube x3
• API Test Tube x5
• API Test Tube x10
• API Test Tubes – Box of 24

Key Features:

• Genuine API replacement tubes – ideal for spares or replacements
• Made from high-quality glass for clarity and precision
• Compatible with all API Liquid Test Kits
• Screw-top plastic caps prevent leaks and maintain sample integrity
• Available in a variety of pack sizes to suit your needs

Perfect for aquarists and pond keepers who regularly monitor water quality, these test tubes ensure accurate results and hassle-free water testing every time.

Aquacadabra acts as credit broker/intermediary and not as a lender.

Klarna's credit products are provided by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority. More information can be found here.

Newpay finance options are provided through Deko’s platform by NewDay. P.D. Aquatics Ltd, t/a Aquacadabra is an Introducer Appointed Representative of Pay4Later Ltd, t/a Deko, which is authorised and regulated by the Financial Conduct Authority (ref no 728646) and is a credit broker, not a lender. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (ref no 690292) and is authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 for the provision of payment services (ref no 555318). More information can be found by clicking the newpay option above, or in the Newpay FAQs.

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.