APT Fix - The 2HR Aquarist


The 2HR Aquarist


The smarter way to treat algae.
Especially effective for BBA, hair/string/fuzz, and most forms of filamentous algae.
Gently biodegrades completely.

Spot-dose up to 1ml per 10L every 24 hours.


The above shows the result of a single dose of APT Fix via the drain-dose method. By Day 2, the hair-algae has lost some of its green color. By Day 5, all the hair algae has been deactivated. You can remove it completely using a fine brush.  

The above shows the result of a single dose of APT Fix via spot-dose method. By Day 2, the inactive BBA would usually change color to red and/or white. These would either decompose, or serve as food for algae-eaters and other microorganisms. By Day 7, the leaf is now mostly free of algae.



Can I just dose straight into the tank?

Yes, but this approach is less effective than spot-dosing or drain-dosing.

Can apt fix treat cyanobacteria and BGA (blue-green algae)?

Yes. It is an effective treatment for cyanobacteria / BGA. 

How often can I dose?

APT Fix biodegrades naturally over 24 hours. So you can repeat the recommended dosage every 24 hours.

I have algae in my new tank!

The most effective way to avoid new-tank algae problems is to properly cycle the tank before planting and introducing fish.
Inadequate Cycling often results in Diatoms ( brown fuzz on the edges of leaves or thin, brownish spider-web-like strands) or Green Water ( which is triggered by excess organic waste).

While APT Fix will work against these forms of algae, it is better to simply have patience (in the case of Diatoms) or review the causes of Green Water as we describe in our guide below on the different types of algae.

Will it kill my plants?

Within the recommended dosage, no.
The exception? Plants that are already very weak.
Both algae and the plants will be similarly affected in such a case.

Also, avoid spot-doing on Mosses, Liverworts (Riccardia and Riccia, etc.), and Vallisneria (Tape Grass) as their cell structures are much more similar to algae than other plants and are therefore more susceptible to being affected. 

I have a very mature tank with lots of algae. will fix help?

Perhaps. FIX gives plants a temporary unfair advantage against algae, and this helps them recover. 

However, plants that are already very weak may not benefit. In fact, FIX may affect them the same way as it impacts algae. 

In a very mature tank, the signs that your plants may be very weak include:
a) Very little or no new leaves over long periods.
b) Widespread algae on leaves.
c) Melting leaves.

Overall they might still look 'OK' but are extremely fragile. In such cases, FIX might affect the way it impacts algae. 

The algae are gone but my leaves do not appear to be recovering?

As a rule, old leaves do not recover as plants channel their energies towards new growth and naturally discard older stems and leaves. You can rid the older leaves of algae, and delay their deterioration, but the leaves will generally not regain coloration or sheen. For most aquatic plants, long-term tank maintenance involves routine replanting of the healthy tops and removing old stems and roots.

Will it kill fish/ shrimp?

APT Fix does not harm healthy fish, shrimp, and other livestock within its recommended dosage. Of course, if you keep very sensitive livestock, you should avoid all products that give you any concern.




Returns Policy

You may return most new, unopened items within 14 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

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