Check the listing for details. Clscea Aquatic CO2 Drop Checker Detachable Tear Drop Shape Without Solution. Color: Drop checker (Acrylic Upgraded Version), Condition: New. Listed at 12.50 USD. Clscea Aquatic CO2 Drop Checker Detachable Tear Drop Shape Without Solution,Upgraded Version- Upgrade version acrylic Tear drop CO2 indicator with a color comparison. Giving you a more accurate color reference. - Unique detachable design for easy solution dropping and product cleaning. No more troubles of incomplete cleaning like other traditional drop checkers. - Acrylic material, no longer worry about fragile like glass, allowing you to use more at ease. Mini, compact, space-saving; drip shape, elegant and beautiful. - By monitoring the CO2 concentration to let you know if the aquatic plants are photosynthesizing adequately. Or if you have fish in your tank, you can also use this product to monitor if your fish are lacking oxygen. - Tips: When fastened, it needs to be rotated so that the indicator will 100% sealed. PaymentsWe accept the following payment methods PayPal and all credit cards Please pay as soon as possible after winning an auction, this will allow for quicker shipping times!ReturnsWe do not accept any returns. Please be sure that what you order is the correct item that you intend to buy.ShippingShipment processing time All orders are processed within 2-3 business days. Orders are not shipped or delivered on weekends or holidays. If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email. No PO Box or international shipping.