Product Overview

Aquasonic Bio-Tet 25 Tabs is a powerful broad-spectrum antibiotic for the treatment of bacterial infections in both marine and freshwater aquariums. Specially formulated with Tetracycline, it is particularly effective against bacteria responsible for fin rot, ulcers, cloudy eyes, and mouth fungus.

It also provides an effective solution for red slime algae (cyanobacteria) outbreaks — a common issue in marine tanks.

Features & Benefits

Treats a Wide Range of Aquarium Infections

Effective against bacteria sensitive to Tetracycline, including those that cause fin rot, ulcers, and cloudy eyes.

Red Slime Algae Control

Also targets cyanobacteria, the cause of red slime algae, making it ideal for reef and marine aquariums.

Safe for Freshwater & Marine Tanks

Can be used in planted aquariums, reef tanks, and fish-only systems.

Visual Indicator of Activity

Turns water red during treatment — a sign that the medication is actively working. Colour fades in about a week.

When to Use

• Fish displaying open sores, frayed fins, or cotton-like growths

• Presence of red slime algae on rocks, sand, or glass

• As a preventive measure during quarantine or acclimation

How to Use (Instructions)

Step 1 – Preparation

Turn off UV sterilizers and remove activated carbon before dosing.

Step 2 – Dosage

Add 1 tablet per 20 litres of aquarium water daily.

Step 3 – Duration

Continue treatment for up to 5 consecutive days. Observe water coloration — red tint indicates active treatment.

Step 4 – Aftercare

Perform a partial water change on Day 6 and monitor water parameters. Staining fades naturally within a week.

⚠️ Prolonged use may negatively impact beneficial bacteria. Use in hospital tanks if possible.

Product Details

• Quantity: 25 tablets

• Treats: Up to 500 liters total

• For Use In: Marine, reef, planted, and freshwater aquariums

• Active Ingredient: Tetracycline

• Brand: Aquasonic (Australia)

Frequently Asked Questions (FAQ)

Why does my aquarium water turn red during treatment?

That’s normal! The red coloration is a visible indicator that the Bio-Tet is working. It fades within a week.

Can I use Bio-Tet in a planted tank?

Yes — safe for planted aquariums when used as directed.

Will Bio-Tet harm my biological filter?

Prolonged use can impact beneficial bacteria. Consider using in a separate treatment tank if possible.