Designed exclusively for use with the Tropica CO2 System BIO, the Tropica CO2 System BIO Refills deliver vital CO2 for planted aquariums and aquascape setups. Each Tropica BIO Refill delivers approximately 60 days of steady CO2 supply - giving your aquarium plants the carbon dioxide they need to flourish and thrive without the complexity of pressurised CO2 cylinders.

Whether you're nurturing a lush aquascape or maintaining a healthy planted aquarium, CO2 is the single most important factor for vibrant, fast-growing plants. When used in conjunction with the Tropica CO2 System BIO unit, the Tropica BIO Refill creates a simple, safe, and cost-effective CO2 solution, perfect for beginners and experienced aquascapers alike.

For best results, use alongside Tropica aquarium plant fertilisers and adequate aquarium lighting to create an underwater planted paradise.

Cut Off Time
Order by 2pm Monday to Friday for same day dispatch (Excluding Bank Holidays).

Direct/Palletised Delivery items may take longer.

Orders Under £49
Standard Delivery (2-3 working days) - £3.99
Express Delivery (1-2 working days) - £5.99

Orders Over £49
Standard Delivery (2-3 working days) - FREE!
Express Delivery (1-2 working days) - £2.99

Timeframes are for standard mainland UK addresses only excluding NI, Scottish Highlands & Islands.

Palletised Deliveries
Some large oversize products, typically items weighing more than 30kg, may require delivery via pallet and as such will arrive as a kerbside delivery only. The drivers in these instances are unfortunately not permitted to assist with the pallet beyond the drop off, and cannot aid in bringing packages into the property.

Pond Planet will contact you to book in delivery on a suitable working day. Delivery will generally take place between 9am and 5pm. To ensure there are no delays with delivery, please include a contact number when placing the order.

Pond Plant Deliveries & Surcharge
Pond plants are subject to a £5.99 delivery surcharge. Pond plants are sent directly from our supplier to make sure the plants you receive are fresh and in great condition. There is no limit on how many you can order for a single delivery charge. This charge is in addition to any other carriage costs for items sent directly from Pond Planet. Please allow 5 -10 working days for delivery.

Returns
If for any reason you are not satisfied with your purchase from Pond Planet, you may return the product(s) to us within 14 days of the purchase date for a refund or exchange.

Goods must be returned in perfect and unused condition, in their original packaging. The buyer must ensure that the goods are securely and adequately packed to avoid damage and the purchaser pays all postage costs. We recommend that products are returned by recorded delivery or by a carrier that requires a signature. Pond Planet accepts no responsibility for goods returned to us unless signed proof can be provided.