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Filter Set - FS300

Filter Set - FS300

Regular price $ 140 USD
Regular price Sale price $ 140 USD
Sale Sold out
Shipping calculated at checkout.

Fits Atla/AquaLiv Water System models A370, A305, and A300.

Inspect for Breakage!

Please inspect your order upon arrival. Report any breakage within 7 days to get replacements without additional charges. Thank you.

Filter Change Frequency

Filter changes are recommended every 1000 gallons or one year, whichever comes first.

Purification performance drops rapidly after one year, and most contaminants are odorless and tasteless. Don't wait until your water tastes bad; that means you've been drinking contaminants for a long time already.

Plus, the filters add magnesium and keep your water alkaline. The magnesium is all consumed within a year.

Filter Discounts

New Atla System owners, check your email for a Filter Change Reminder sent 11 months after your system purchase. It includes a $20 filter discount. Use the discount to start your filter subscription at the lowest possible price. Future shipments will include the $20 discount automatically.

Previous customers, we are replacing our $20 annual discount code program with the subscription program. Be sure to subscribe to save $20 on filters annually. If you have a valid discount code, you can use it in your subscription order.

When you change your filters on schedule, you're paying just $0.31 per day to have supernatural water on tap at home. Compare our value to any other premium water on the market!


Filter Set FS300 includes everything to replenish your Atla/AquaLiv Water System. Please note that the big tank never needs filters or servicing outside of sanitizing during filter changes.


Atla recommends sanitizing your system as part of the annual filter change process to ensure your system is free of pathogens.

Sani-System sanitizer is designed to clean water systems safely. Sani-System liquid concentrate is efficient and easy to use. It is pre-measured in the correct dose for your system:

  • Kills 99.9% of harmful bacteria
  • EPA and NSF approved
  • Reliable, effective results
  • Will not damage system seals and o-rings like chlorine/bleach or hydrogen peroxide
  • Leaves no residue behind
  • Made in the USA
  • Will not void your Atla/AquaLiv System warranty

Sanitizing instructions are included with the filter change instructions.


  • Does your system consist of two (2) or three (3) independent modules?
  • Do you have one (1) purification module comprised of three (3) filters?

If yes on both, this cartridge set is for you. 

Filter Change Instructions

Step-by-step filter change instructions are included with every filter set. You can also download the instructions below.

Filter Change Instructions PDF

View full details

New! Forever Warranty with a Subscription 🧡

Customers with an active filter subscription with two or more past automatic shipments are now under warranty, regardless of purchase date. We will repair or replace your Atla Water System at no charge.

You may never purchase another water system again!

Forever Warranty excludes faucets, shipping, and installation. Our warranty does not cover damage to the system or property damage. All plumbing systems should be inspected periodically to ensure an absence of leaks that may result in damage to surrounding areas.

We Aim to Keep Filter Prices Low

When our water system launched in 1999, replacement filters were $99 with free shipping.

According to the US Inflation Calculator, a product that cost $99 in 1999 will cost $137.38 in 2022.

However, in 1999, we didn't have a $20 discount for customers replacing their filters annually.

As a result, most of our customers today are paying 16% less for replacement filters than when our water system launched in 1999.

Plus, these aren't the cheap filters our competitors use. Each Atla filter set contains over four pounds of filtration media.

Start your filter subscription today and save $20 on every future shipment!

When subscribed, you're paying just $0.31 per day to have supernatural water on tap at home. Compare our value to any other premium water on the market!