Aquasonic Formalin / Malachite 1L – Effective Parasite & Fungal Treatment

Product Overview

Aquasonic Formalin / Malachite 1L is a highly effective treatment for a wide range of common fish diseases, including whitespot (Ich), external parasites, fungus, slimy skin disease, and cloudy skin conditions.

This copper-free formula is suitable for freshwater aquariums and is best used in fish-only systems, as it is not safe for invertebrates.

Features & Benefits

Powerful Dual Action Formula

Combines Formalin and Malachite Green for rapid treatment of whitespot, ectoparasites, and fungal infections.

Visible Improvement in Skin Clarity

Helps reduce turbid, cloudy, or slimy skin for visibly healthier fish.

Fast-Acting

Begins working quickly to relieve irritation and eliminate pathogens.

Copper-Free Solution

Safe for use in copper-sensitive tanks, though not suitable for invertebrates.

Trusted Australian Brand

Formulated by Aquasonic, a leader in professional aquarium treatments.

When to Use

• Fish show signs of whitespot (Ich)

• Presence of external parasites on skin or gills

• Cloudy or slimy skin conditions

• Fungal growth or discoloration on fins/body

• Ideal for use in fish-only freshwater aquariums

How to Use (Instructions)

Step 1 – Prepare Aquarium

Remove invertebrates and turn off UV sterilizers during treatment. Maintain good water flow and aeration.

Step 2 – Dose

Add 5mL per 20 litres of aquarium water daily for 4 days.

Step 3 – Increase Temperature

Increase water temperature by 2–3°C during treatment to improve effectiveness (within species-safe limits).

Step 4 – Monitor Fish

Watch for signs of improvement. Perform a partial water change after treatment is complete.

Do not use in tanks with shrimp, snails, or other invertebrates.

Product Details

• Size: 1 Litre

• Treats: Up to 4,000 litres over 4 days

• For Use In: Freshwater aquariums (fish-only)

• Targets: Whitespot, external parasites, fungus, slimy skin disease

• Brand: Aquasonic (Australia)

Frequently Asked Questions (FAQ)

Can I use this in a tank with shrimp or snails?

No — not suitable for invertebrates. Use in fish-only tanks.

Will raising the temperature help?

Yes — increasing the temperature by 2–3°C can boost treatment efficiency, especially for whitespot.

Is it safe for all freshwater fish?

It is safe when dosed correctly. Always monitor fish during treatment and avoid overdosing.