---
product_id: 271343783
title: "145300 Total Hardness Test Kit, Model 5-b"
brand: "hach"
price: "A$137"
currency: AUD
in_stock: true
reviews_count: 5
category: "Hach"
url: https://www.desertcart.com.au/products/271343783-145300-total-hardness-test-kit-model-5-b
store_origin: AU
region: Australia
---

# Accurate total hardness measurement Cost-effective water softener monitoring Quick and easy testing process 145300 Total Hardness Test Kit, Model 5-b

**Brand:** hach
**Price:** A$137
**Availability:** ✅ In Stock

## Summary

> 💧 Don’t let hard water harsh your vibe—test, fix, and glow up your water game!

## Quick Answers

- **What is this?** 145300 Total Hardness Test Kit, Model 5-b by hach
- **How much does it cost?** A$137 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/271343783-145300-total-hardness-test-kit-model-5-b)

## Best For

- hach enthusiasts

## Why This Product

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

## Key Features

- • **Save on Soap & Energy:** Identify hardness to reduce excess soap use and prevent scale buildup
- • **Prevent Costly Repairs:** Early detection of softener failure saves hundreds in service fees
- • **Precision You Can Trust:** Detects calcium & magnesium ions for exact water hardness levels
- • **DIY Water Quality Control:** Simple, clear instructions empower you to monitor your water softener’s efficiency
- • **Professional Grade, Home Friendly:** Used by experts, designed for easy at-home testing

## Overview

The Hach 145300 Total Hardness Test Kit offers a reliable, easy-to-use solution for measuring water hardness caused primarily by calcium and magnesium ions. Ideal for homeowners and professionals alike, it helps optimize water softener performance, reduce soap consumption, and prevent costly scale damage. With clear instructions and quick results, this kit empowers you to maintain soft water and avoid expensive repairs.

## Description

Water hardness is caused almost entirely by calcium and magnesium ions. Other di- and trizalent metals have a similar effect, but usually are not present in high enough concentration in potable waters to cause problems. Hardness increases soap consumption in laundries and causes scale in boilers. Hardness test kits include the inexpensive Models 5-B and 5-EP designed for those needing quick checks on the efficiency of water softeners. More sophisticated test kits allow the determination of total hardness as well as calcium and magnesium (by difference).

Review: This kit works great! My daughter has been complaining that her hair doesn't feel clean after shampooing. She said she needs a different shampoo. Then it dawned on me that my hair has been feeling the same way. I told my husband that I think we have hard water and something is wrong with our water softener. He replied, "No, our water is not hard, it is soft" Hmmmm A friend stopped by last week and said, "what did you do to your hair??? It is lighter than I have ever seen it and it looks like you have Orange highlights!!" I had not done anything, but I did notice that my hair color was a bit different lately (I am a brunette) and didn't know why. She looked closer and felt the ends of my hair and said, "you have hard water". So, I went on desertcart to order the testing strips, but read the many reviews and finally decided this kit would be more accurate than the strips. I received it the next day. Sure enough, it took over 20 drops for the mixture to turn blue. Yep, our water is HARD! The company that installed our water softener came out today. The kit he brought with him was almost identical to this one. I watched him and it took 25 drops for the water to turn blue~ the softener is not working at all. He took the unit with him to do repairs. " Rebed & Valve Repair". The parts are under warranty, so we just have to pay for service & labor charges. He will be back Friday with the repaired water softener. The bad news: The labor and service charge is going to be over $550!! Wow, that seems high for the Service Charge and Labor Only!! Ugh :( However, I do highly recommend this test kit. Instructions on the box were clear and easy to follow. Maybe if we had bought this test earlier to use on occasion, we could saved some money in repairs. After it is fixed, I will think I will continue to use this kit on a Monthly basis to make sure the softener continues to be working as it should. ;).
Review: I've worked in Municipal water treatment for 30 years, and I've used them all. This is a good product, easy to use. Price is reasonable. Would have many many tests in this kit.

## Features

- Water hardness is caused almost entirely by calcium and magnesium ions
- Hardness increases soap consumption
- Hardness test kits include the inexpensive Models 5-B and 5-EP

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B008FM7WLU |
| ASIN  | B008FM7WLU |
| Batteries Included? | No |
| Batteries Required? | No |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,863) |
| Customer reviews | 4.6 4.6 out of 5 stars (1,863) |
| Date First Available | 15 February 2015 |
| Date First Available  | 15 February 2015 |
| Included components | Lab |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 254 g |
| Item model number | 145300 |
| Item model number  | 145300 |
| Manufacturer | HACH COMPANY |
| Manufacturer  | HACH COMPANY |
| Package Dimensions | 12.8 x 6.81 x 6.6 cm; 254.01 g |
| Package Dimensions  | 12.8 x 6.81 x 6.6 cm; 254.01 g |
| Part number | 145300 |

## Images

![145300 Total Hardness Test Kit, Model 5-b - Image 1](https://m.media-amazon.com/images/I/81yV7KboZvL.jpg)

## Questions & Answers

**Q: Okay, what am I doing wrong.  The water was blue, not pink when I added the microspoon of  chemical, no drops added.**
A: It means your water is soft already. If it was pink, then however many drops you add to turn it blue, thats how many grains hard your water is. Since you did not have to add any drops that means your water is 0 grains hard.

**Q: What is the hardness range for this test kit? Thanks**
A: You can always dilute your sample to extend the range.  Dilute with soft water (distilled, clean rain water, or previously softened water).  Just check that the soft water tests for zero hardness before using it.  1:1 dilution would double your range.  1:9 would extend the range by a factor of 10.  A cheap drugstore syringe could be used for dilutions if you don't want to eyeball it.

**Q: Does this kit come with the test tube and mixing bottle like the one from Hach?**
A: Hach's part number 145300 does come with the measuring tube PN43800 and Glass Bottle PN 43900

**Q: Why would the color of soft water turn blue as soon as the indicator is added to the sample, without any additionof the titrant?**
A: This happens normally, if the water is soft (zero grains of harness). The grains of hardness is the number of drops of titrant you have to add to get the water to turn blue. If you do not have to add any drops of titrant, then you have zero grains!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***3 on 7 March 2017*

This kit works great! My daughter has been complaining that her hair doesn't feel clean after shampooing. She said she needs a different shampoo. Then it dawned on me that my hair has been feeling the same way. I told my husband that I think we have hard water and something is wrong with our water softener. He replied, "No, our water is not hard, it is soft" Hmmmm A friend stopped by last week and said, "what did you do to your hair??? It is lighter than I have ever seen it and it looks like you have Orange highlights!!" I had not done anything, but I did notice that my hair color was a bit different lately (I am a brunette) and didn't know why. She looked closer and felt the ends of my hair and said, "you have hard water". So, I went on Amazon to order the testing strips, but read the many reviews and finally decided this kit would be more accurate than the strips. I received it the next day. Sure enough, it took over 20 drops for the mixture to turn blue. Yep, our water is HARD! The company that installed our water softener came out today. The kit he brought with him was almost identical to this one. I watched him and it took 25 drops for the water to turn blue~ the softener is not working at all. He took the unit with him to do repairs. " Rebed & Valve Repair". The parts are under warranty, so we just have to pay for service & labor charges. He will be back Friday with the repaired water softener. The bad news: The labor and service charge is going to be over $550!! Wow, that seems high for the Service Charge and Labor Only!! Ugh :( However, I do highly recommend this test kit. Instructions on the box were clear and easy to follow. Maybe if we had bought this test earlier to use on occasion, we could saved some money in repairs. After it is fixed, I will think I will continue to use this kit on a Monthly basis to make sure the softener continues to be working as it should. ;).

### ⭐⭐⭐⭐⭐ Review
*by N***E on 12 February 2026*

I've worked in Municipal water treatment for 30 years, and I've used them all. This is a good product, easy to use. Price is reasonable. Would have many many tests in this kit.

### ⭐⭐⭐⭐⭐ Review
*by J***8 on 24 October 2025*

Easy to use and seems to be accurate.

## Frequently Bought Together

- Hach Total Hardness Test Kit, Model 5-B, Water Analysis Kit for Drop Count Titration, with 2 Reagents, Measuring Tube, Square Bottle & Measuring Scoop, 145300
- HoneForest Water Quality Tester, Accurate and Reliable, TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-20*