DrTim's Aquatics One & Only Reef Aquarium Treatment, 237 ml Biofilter Support

DrTim's Aquatics One and Only Reef is an aquarium treatment designed to convert waste into a non-toxic form in reef, nano and seahorse tanks; this 8 fl oz (237 mL) size helps establish a biofilter.

• For reef, nano and seahorse aquariums — made for these aquarium types.
• Converts aquarium waste into a non-toxic form — helps manage waste in the tank.
• Creates a biofilter and removes nitrite and toxic ammonia naturally — supports aquarium water quality.
• 100% natural, with no sulfur or offensive odors — a low-odor treatment option.
• Available in several bottle sizes — choose from 2, 4, 8, 16, 32, 64 or 128 fl oz.

Aquarium waste can build up even when a tank receives regular water changes and maintenance, and waste may take up to 30 days to eliminate. One & Only Reef is made for aquarium setup and routine tank-care moments, including filter cleaning, adding fish and changing water. It is intended for reef, nano and seahorse systems.

What does One and Only Reef do in an aquarium?

It is formulated to convert aquarium waste to a non-toxic form and naturally remove nitrite and toxic ammonia. The solution instantly creates a biofilter, helping address the waste-processing gap that can occur in an aquarium. The brand also says the formula eliminates new tank syndrome.

• Designed for use in reef, nano and seahorse fish tanks.
• Supports aquarium waste processing through biological filtration.
• Made for tanks with fish and corals.

When can I use One and Only Reef?

Use it when setting up a new aquarium, cleaning a filter, adding new fish or after a water change. These are the tank-care situations the solution is made to support, including times when aquarium waste needs to be processed.

• New aquarium setup
• Filter cleaning
• Adding new fish
• After a water change

What size is this bottle, and what other sizes are available?

This product is the 8 fl oz (237 mL) size; the One & Only range also comes in 2 fl oz (59 mL), 4 fl oz (118 mL), 16 fl oz (473 mL), 32 fl oz (946 mL), 64 fl oz (1.89 L) and 128 fl oz (3.79 L) sizes. The formula is 100% natural and contains no sulfur or other offensive odors. DrTim's Aquatics develops aquarium products drawing on marine biology experience, scientific evidence and innovative research.

• One & Only is available in seven listed sizes.
• This page is for the 8 fl oz bottle size.

DrTim's Aquatics One and Only Reef suits aquarium keepers setting up or maintaining reef, nano or seahorse tanks, including those caring for systems with fish and corals. Its stated uses include setup, filter cleaning, adding fish and post-water-change care, with a biofilter designed to process aquarium waste.

Read our guide: A beginner’s aquarium set-up checklist: from bowl to tank