Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets
Free UK delivery on every order
Free 30-day returns · Secure checkout
Everyday essentials for dogs, cats & small pets

Orders are prepared in 1-3 business days and most orders arrive 3-7 business days after dispatch. You will get a tracking number by email.
You have 30 days from delivery to return an item for any reason. We email a prepaid return label, and your refund goes back to your original payment method within 10 business days of us receiving the item.
If you have a question about an item or your order, email bathpetsupplies.co.uk@gmail.com with the product name or order number. We reply within 1 business day (Monday to Friday).
DrTim’s Aquatics One & Only is a 4 oz (118 mL) live nitrifying solution for freshwater aquariums, designed to jumpstart cycling and support biological filtration.
Starting a freshwater aquarium or refreshing its filtration means establishing and maintaining the biological processes that support water quality. One & Only is intended for those setup and maintenance moments, including new builds and resets. Its live nitrifying solution supports cycling and biological filtration, giving aquarists a simple addition to their freshwater routine rather than a product intended for saltwater systems.
It is designed to jumpstart natural cycling and support biological balance in freshwater tanks. The solution contains naturally occurring organisms that support biological filtration, helping the aquarium maintain consistent parameters and water clarity. During a fresh setup or reset, it helps the system reach stable conditions sooner; during ongoing care, it can be used to refresh conditions after maintenance.
One & Only is made for freshwater systems, including tropical, planted, and community aquariums. It is compatible with water conditioners and test kits, making it suitable for use alongside those freshwater-care products. Choose it for a freshwater aquarium where support for biological filtration and water stability is the goal.
Use it during aquarium setup and after filter cleanings or water changes. Application is a shake-and-pour process, with directions provided for dosing. This makes it straightforward to include when establishing a tank or carrying out the maintenance occasions the solution is intended to support.
One & Only is suited to freshwater aquarists setting up a tank, resetting a system, or maintaining tropical, planted, and community aquariums. It is intended for freshwater use, with its role centered on cycling and biological filtration rather than serving as a general solution for every aquarium type. Its 4 oz (118 mL) format and shake-and-pour application fit into setup and routine freshwater maintenance.
Q: Can DrTim’s Aquatics One & Only be used with water conditioners and test kits?
A: Yes. DrTim’s Aquatics One & Only is compatible with water conditioners and test kits for freshwater aquarium care.
Q: How do you apply DrTim’s Aquatics One & Only?
A: DrTim’s Aquatics One & Only uses a shake-and-pour application. Follow the product’s dosing directions.
Free UK delivery on every order, with no minimum. Orders are prepared in 1-3 business days and most orders arrive 3-7 business days after dispatch. You will get a tracking number by email. See our shipping policy.
Free returns within 30 days. You have 30 days from delivery to return an item for any reason. We email a prepaid return label, and your refund goes back to your original payment method within 10 business days of us receiving the item. See our returns policy.
Damaged or wrong item? Email a photo to bathpetsupplies.co.uk@gmail.com and we will make it right.
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