---
product_id: 7253542
title: "API REPLACEMENT PLASTIC TEST TUBES WITH CAPS For Any Aquarium Test Kit Including API Freshwater Master Test Kit 24-Count Box"
brand: "api"
price: "€ 51.94"
currency: EUR
in_stock: true
category: "Api"
url: https://www.desertcart.at/products/7253542-api-replacement-plastic-test-tubes-with-caps-for-any-aquarium
store_origin: AT
region: Austria
---

# snap-tight secure caps 24 precision test tubes durable reusable plastic API REPLACEMENT PLASTIC TEST TUBES WITH CAPS For Any Aquarium Test Kit Including API Freshwater Master Test Kit 24-Count Box

**Brand:** api
**Price:** € 51.94
**Availability:** ✅ In Stock

## Summary

> 🧪 Keep your aquarium testing flawless—never miss a beat with API’s trusted replacements!

## Quick Answers

- **What is this?** API REPLACEMENT PLASTIC TEST TUBES WITH CAPS For Any Aquarium Test Kit Including API Freshwater Master Test Kit 24-Count Box by api
- **How much does it cost?** € 51.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/7253542-api-replacement-plastic-test-tubes-with-caps-for-any-aquarium)

## Best For

- api enthusiasts

## Why This Product

- Trusted api brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted API Quality:** Backed by nearly 60 years of aquarium care expertise for reliable results.
- • **Secure Snap-Tight Caps:** Leak-proof design ensures accurate testing every time.
- • **Universal Compatibility:** Fits all API aquarium test kits—freshwater, saltwater, reef, and more.
- • **Bulk 24-Pack Convenience:** Ample supply to replace lost or damaged tubes without interruption.
- • **Durable Plastic Construction:** Long-lasting, reusable tubes built for consistent performance.

## Overview

This 24-count box of API replacement plastic test tubes with snap-tight caps is designed for use with any API aquarium test kit, including freshwater, saltwater, reef, and pond kits. Made from durable plastic, these tubes ensure secure, leak-proof testing and are perfect for replacing lost or damaged original tubes. Backed by API’s 60 years of aquarium care expertise, they help maintain a healthy aquatic environment for all your fish.

## Description

API TEST TUBES serve as replacement test tubes for those included in API TEST KITS. Product comes with 24 capped test tubes in API box. Test tubes may be used with all liquid API TEST KITS. With API aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too.

## Features

- Contains one (1) API REPLACEMENT TEST TUBES WITH CAPS For Any Aquarium Test Kit Including API Freshwater Master Test Kit 24-Count Box
- Compatible with any aquarium water test kits including freshwater and saltwater test kit, pH test kit, ammonia test kit, nitrate test kit, reef test kit, calcium test kit and more
- The API test tubes are perfect to replace API Freshwater Master Test Kit tubes, API Saltwater Master Test Kit tubes, API Reef Master Test Kit tubes, API Pond Master Test Kit tubes and any other API Test Kit tubes
- Snap-tight plastic caps
- Use when original tubes have been lost or damaged

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002AQL5G |
| ASIN  | B0002AQL5G |
| Best Sellers Rank | #59,712 in Pet Supplies ( See Top 100 in Pet Supplies ) #89 in Aquarium Test Kits |
| Brand Name | API |
| Color | No Color |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,322) |
| Date First Available | June 15, 2004 |
| Date First Available  | June 15, 2004 |
| Department | Unisex-Adult |
| Department  | Unisex-Adult |
| Item Dimensions LxWxH | 7.13 x 1.25 x 3.5 inches |
| Item Package Dimensions L x W x H | 7.17 x 3.7 x 1.34 inches |
| Item Weight | 3.17 ounces |
| Item model number | 32 |
| Item model number  | 32 |
| Manufacturer | Mars Fishcare |
| Manufacturer  | Mars Fishcare |
| Material | Plastic |
| Model Name | PLASTIC REPLACEMENT TEST TUBES W/CAPS |
| Number of Items | 1 |
| Product Dimensions  | 7.13 x 1.25 x 3.5 inches; 3.17 ounces |
| Size | 24 PACK |
| Style | Replacement Test Tubes |
| Target Audience Keyword | fish |

## Images

![API REPLACEMENT PLASTIC TEST TUBES WITH CAPS For Any Aquarium Test Kit Including API Freshwater Master Test Kit 24-Count Box - Image 1](https://m.media-amazon.com/images/I/61ISuZ5rlRL.jpg)

## Questions & Answers

**Q: What are the dimensions of the vial? Is there a cheaper alternative? 20 dollars seems like a lot for what we're getting.**
A: If you don't need 20 of them, you can get a 6 pack for a lot cheaper: https://www.amazon.com/Aquarium-Pharmaceuticals-API-Replacement-Test/dp/B07G4NGMM8/ref=sr_1_1?keywords=5ml+test+tube&qid=1645582702&sr=8-1 More expensive per tube though.

**Q: Can these be used to store Isopropyl Alcohol for on to go first aid kit? How big is the tube and is it fragile or strong enough for extended use?**
A: I have noticed that the caps, while quite appropriate for water parameter test kits, would not be suitable for long-term storage of any liquid. They leak a bit.

**Q: What test tube rack would be best for these?**
A: I built my own. If you want a cheap hack, get a block of styrofoam and press the top of an open test tube into it at intervals to get the outer diameter perfect. Then cut out the styrofoam to the best depth. Test tubes fit snugly.

**Q: Do you sell just a box of replacement caps?**
A: If you looked for caps already and no results, that means that tubs with caps are sell together. No separate. You might want to contact the API and asked them directly.

## Frequently Bought Together

- API Replacement Test Tubes With Caps
- WUTUDMAI 2 Pcs Test Tube Stand Holders 6 Holes 6 Column Plastic Test Tube Racks Portable Test Tube Racks for Laboratory School Home (Blue PP)

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-08-26*