Water filter vs purification tablets: what Australian hikers should carry
If you've ever searched for "water filter tablets", you're not alone. It's a common mix-up, because filters and tablets both make water safer to drink but work in completely different ways. A filter physically strains contaminants out of the water. Water purification tablets, like Katadyn's Micropur Forte, disinfect the water with chemicals. So which one should you pack?
For most Australian hikers, the answer is a bit of both. In this explainer, we break down how each works, where each one falls short and how to build a simple, light setup. You can also browse our full range of hiking water filters at any time.
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The short answer
- Carry a filter as your main method. It's quick, reusable and works for bacteria, protozoa and microplastics.
- Carry water purification tablets as a light backup. They cover viruses, weigh next to nothing and don't need cleaning.
- Overseas or unsure about your water source? Use both.
How a water filter works
A hiking filter uses a membrane with tiny pores. Water passes through, and bacteria, protozoa such as Giardia and Cryptosporidium, and microplastics are left behind. The Sawyer and Katadyn filters in this guide use a 0.1 micron membrane, and there's no waiting time: you filter and drink.
The catch is that none of the filters in this guide list viruses on their product pages. Filters also need a little care. Sawyer filters, for example, are backflushed with a plunger, and the LifeStraw Peak Squeeze comes with a backwash accessory for sandy or silty water.
How water purification tablets work
Water purification tablets disinfect your water chemically. Katadyn's Micropur Forte tablets are chlorine-based, and you add one tablet per litre of water, then wait. There's nothing to pump, squeeze or clean, and the pack is small and light.
The trade-offs are the wait time and the water quality. The Micropur Forte page describes the tablets as suited to clear water, and says to use them in combination with a filter for murky water.
Katadyn Micropur Forte: what you need to know
The Katadyn Micropur Forte tablet pack contains 100 tablets, treating one litre each. Here's what the product page lists:
- Bacteria: 30 minutes contact time.
- Viruses: 30 minutes contact time.
- Giardia: 120 minutes contact time.
- Cryptosporidium: not listed on the page. This is a good reason to pair the tablets with a filter.
- Shelf life: 5 years. Silver ions also preserve treated water for up to 6 months.
Always follow the instructions on the pack.
Water filter vs purification tablets at a glance
| Water filter (e.g. Sawyer Mini) | Purification tablets (Micropur Forte) | |
|---|---|---|
| How it works | Physically strains water through a 0.1 micron membrane | Chlorine-based disinfection |
| Bacteria and protozoa | Yes (over 99.99999% of bacteria, over 99.9999% of protozoa) | Bacteria in 30 minutes, Giardia in 120 minutes |
| Viruses | Not listed | 30 minutes contact time |
| Waiting time | None. Sawyer lists 60 L/hr for the Mini | 30 to 120 minutes |
| Murky water | Needs regular backflushing, and sandy or silty water needs extra care | Best in clear water; use with a filter if murky |
| Lifespan | 378,000 L with regular backflushing (Mini) | 5 years shelf life; 100 tablets per pack |
The filters we'd pair with your tablets
If you're building a light, flexible setup, these are the filters we recommend most. Our best hiking water filters in Australia guide compares them in detail.
Sawyer Mini: the lightweight classic
The Sawyer Mini weighs 87 g as a kit (39 g for the filter alone), with a 500 mL pouch, a straw and a cleaning plunger. It's a great light pairing with a pack of Micropur Forte tablets.
Sawyer Micro Squeeze: a bigger pouch
The Sawyer Micro Squeeze comes with a Cnoc Premium 750 ml pouch and weighs 96 g with the filter. It's a good step up if you want more capacity without much extra weight.
Sawyer Gravity: easy water for the camp
The Sawyer One Gallon Gravity Filtration System lets you hang a 1-gallon bladder and let gravity do the work, which makes it ideal for groups. Our Sawyer Mini vs Micro Squeeze vs Squeeze guide explains how the Sawyer range compares.
Shop the Sawyer Gravity system
LifeStraw Peak Squeeze: filter and bottle in one
The LifeStraw Peak Squeeze (listed as the LifeStraw Peak Collapsible Squeeze Bottle) comes in 650 ml and 1 L sizes, with a filter life of up to 4,000 L and a backwash accessory for silty water.
Shop the LifeStraw Peak Squeeze
Katadyn BeFree: fast flow and better taste
The Katadyn BeFree is a soft flask with a two-stage filter, listed with a flow rate of up to 2 L/min and an activated carbon stage that improves taste and odour.
What should you carry?
- Day walks: a Sawyer Mini or Katadyn BeFree is plenty.
- Multi-day bushwalks: a filter plus a small pack of Micropur Forte tablets as a backup if your filter clogs or fails.
- Group trips and camp: the Sawyer Gravity system, with tablets in the first aid kit.
- Overseas trekking or unreliable water: a filter and tablets together, since filters don't list viruses.
- Caravan and road trips: see our water filter caravan guide.
Keep learning
Want to go deeper? These guides will help:
- Hiking water filters buyer's guide
- Water filter bottles vs portable filters
- Best hiking water filters in Australia (2026)
- Sawyer Mini vs Micro Squeeze vs Squeeze
- Water filter for your caravan on the road
Why shop with us at PAST Outdoors
We're a family-owned Australian outdoor retailer based in Helensburgh, NSW, and we only stock gear we trust. Whether you're after water purification tablets, a filter or both, we can help you choose the right setup for your trip.
Frequently asked questions
Are water filter tablets the same as water purification tablets?
People often search for "water filter tablets", but tablets don't filter water. They disinfect it. The correct term is water purification tablets, and Katadyn Micropur Forte is one example.
Do I need a filter if I carry purification tablets?
We recommend both for longer trips. The Micropur Forte page says the tablets suit clear water and should be used with a filter in murky water, and Cryptosporidium contact time isn't listed.
How long do Micropur Forte tablets take to work?
The product page lists 30 minutes for bacteria and viruses and 120 minutes for Giardia. Use one tablet per litre and follow the instructions on the pack.
Do water filters remove viruses?
Viruses are not listed on the product pages for the Sawyer Mini, Micro Squeeze, Gravity, LifeStraw Peak Squeeze or Katadyn BeFree. If virus protection matters, add purification tablets or use a purifier.
How long do purification tablets last?
Micropur Forte tablets have a listed shelf life of 5 years. Silver ions also keep treated water preserved for up to 6 months.
What is the best water filter to carry with tablets?
The Sawyer Mini is a light, simple pairing, weighing 87 g as a kit. For more capacity, try the Sawyer Micro Squeeze, or for groups, the Sawyer Gravity system.
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Build your water kit
A reliable filter, a pack of purification tablets and you're set for your next trip.
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