Check the listing for details. DIY Accessories CO2 Generator System Kit with Diffuser For Aquarium Live Plants. Condition: New. Listed at 21.55 USD. DIY Accessories CO2 Generator System Kit with Diffuser For Aquarium Live Plants Description: Well suitable for DIY Co2 system and low cost planted tank use. Getting Basic, Easy set up, Simply, Nano, Cool, Low Price, Good Looking! Condition: new Package included: 2x caps, 1x needle valve 1x Pressure gauge 1x small glass co2 diffuser CO2 tubing What you need to prepare this system?? 2x 2 Litre of Coka Cola plastic bottle 1x 200g of Citric acid or 200ml of vinegar 1x 200g of baking soda Note: 1: The bottle must be carbonated beverage bottle, do not use the bottles which supply green tea, mineral water.etc 2: Trimming valve regulation avoid by sudden big or small, can’t suddenly turn up, after immediately shut down again, so as not to cause abnormal pressure to the bottle. Shipping 1. Orders processed within 1 business day after received payment. 2. We only ship to ebay addresses. Your ebay address must match your Shipping address. 3. We will track the shipment and get back to you as soon as possible with a reply. Return 1. We accept Return within 30 days for refund or replacement. 2. Confirm for address and reference number before return, we will offer replacement or refund after received the return parcel. Customer service If you have any question ,please sent me ebay message. we usually reply within 1 business days as quickly as possible. We greatly appreciate your positive feedback and will do the same. We treasure every feedback from our customers, We strive for 5 star positive Feedback on all transactions. If you are considering giving a neutral or negative Feedback or a low DSR (1's, 2's). Do write to us and give us an opportunity to resolve it for you firstly for your satisfaction.