Click to expand Tap to zoom UP Aqua D-518 Bubble Counter Mini by UP Aqua Save $-5.00 $5.00 | / SKU UPD518 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Success! We will notify you when stocks are back! There was an error signing up for restock notifications. Please try again. UP Aqua D-518 Bubble Counter Mini Used with the water plant meter, you can clearly see the CO2 gas output! Make sure the water plant meter and CO2 bottle are not damaged!