Over time, the fluid inside your glass drop checker will naturally fade, lose its vibrancy, and become less reactive to your tank's chemistry. If you want to ensure your fish and shrimp stay completely safe from accidental gas spikes, refreshing your fluid is a vital maintenance chore. The UNS Drop Checker Solution (30ML) is a high-purity replacement indicator fluid that keeps your monitoring system pin-sharp. Key Features & Benefits A double-sized 30ml volume bottle offers a long-lasting supply, keeping your essential monitoring gear running smoothly for months. A universal chemical design works flawlessly with the UNS Drop Checker lineup or any alternative brand of glass monitoring hardware. The Color Guide: How to Read Your Levels Because CO₂ drops the pH of your water as it dissolves, the indicator solution changes color to tell you exactly where you stand. Note: Readings are not instant. Please allow a minimum of 1 hour for the solution to accurately reflect your current tank levels. Blue (Low): Your carbon levels are too low. Your plants may stall out, allowing opportunistic algae to take hold. Green (Optimal): The sweet spot! Carbon levels are perfectly sufficient for lush, high-tech plant growth and safe for your livestock. Yellow (High): Danger zone. Your CO₂ levels are too high and are posing an immediate risk to your fish and shrimp. Turn down your regulator immediately. Product Specifications Liquid Volume: 30ml Solution Type: Pre-mixed, ready-to-use pH indicator fluid Replacement Interval: For maximum accuracy, we highly recommend replacing the fluid inside your drop checker every 4 to 6 weeks, or whenever the liquid begins to lose its color vibrancy. Important Note: This listing includes the 30ml replacement indicator solution only. The physical glass testing hardware is sold separately. If you need to pick up the actual testing piece, Click here to shop the Glass UNS Drop Checker. What’s in the Box? 1x UNS CO₂ Drop Checker Solution (30ML)
