Catch Ammonia and pH Trouble Before Your Fish DoAmmonia is the number one killer in aquariums, and pH can drift dangerously without warning. By the time your fish show stress, the damage is often already done.The Alert Combo pairs Seachem's Ammonia Alert and pH Alert, two innovative color sensors that continuously monitor your water. Each sensor changes color reversibly relative to concentration, so there are no test kits, chemicals, or procedures needed. Ammonia Alert detects less than 0.05 mg/L free ammonia and lasts over a year, while pH Alert tracks shifts between 5.4 and 8.0, both roughly half the size of competing products so they stay unobtrusive.Both monitors come from Seachem Laboratories, the chemistry-driven company founded in 1979 in Madison, Georgia, USA. Seachem develops its products in-house with its own chemists, and that scientific rigor is what makes the Alert series so distinctive: rather than reading total ammonia the way most kits do, the Ammonia Alert sensor responds only to the toxic free ammonia form, giving you an accurate, well-engineered read on the parameter that actually harms fish. Place each Alert visibly in the aquarium or filter. Let the sensors equilibrate, then read the color against the reference. Act the moment a color shift signals rising ammonia or a pH change. Stop guessing and start monitoring around the clock. Add to cart.What It DoesAmmonia Alert is a color device for continuously detecting and monitoring toxic free ammonia; a sensor changes reversibly from yellow to green to blue relative to the ammonia concentration. It detects less than 0.05 mg/L (ppm) free ammonia and alerts you to the #1 killer before any sign of stress, lasting over a year for marine or freshwater use. pH Alert is a color device placed in the aquarium or filter to monitor pH continuously, changing color reversibly to alert you to shifts in pH levels between 5.4 and 8.0, for freshwater only. Ammonia Alert lasts over 9 times as long as competing products (over a year compared to 4-6 weeks) and pH Alert lasts up to 4 times as long as competing products; both are almost half the size of competing products (1.5" x 2.5").How to UseAmmonia Alert: No sampling of water, chemicals, or test procedures are required. The presence of the free ammonia is detectable continuously with a response time of about 15 minutes. Response to decreasing ammonia is slower, requiring about 4 hours to go from TOXIC to SAFE on removal of ammonia. pH Alert: Simply place pH Alert visibly anywhere in the aquarium or filter. It's that easy. No chemicals or test procedures are required. When first put in service, response time will be about 30 minutes. Thereafter, pH shifts will register within ten minutes.Why Seachem Alert Combo Continuous, at-a-glance monitoring: both sensors update on their own around the clock, so you catch rising ammonia or a pH shift the moment a color changes instead of waiting for a scheduled test. Reads only the toxic free ammonia: Ammonia Alert responds to the free ammonia form that actually harms fish, detecting less than 0.05 mg/L before any sign of stress. No reagents or procedures: no water sampling, chemicals, or test steps for either sensor, and their reversible color change means they keep working as conditions change. Long-lasting and unobtrusive: Ammonia Alert lasts over a year and pH Alert up to 4 times as long as competitors, both almost half the size (1.5" x 2.5") so they stay out of sight. Best ForIdeal for new and cycling tanks where free ammonia spikes are most dangerous, for quarantine setups where you need constant reassurance, and for any hobbyist who wants ongoing, hands-off monitoring. Pair them together for freshwater tanks; in marine systems rely on Ammonia Alert, since pH Alert is for freshwater only.FAQFreshwater or saltwater? Ammonia Alert works in both marine and freshwater aquariums, while pH Alert is for freshwater only.How long does it last? Ammonia Alert lasts over a year (more than 9 times as long as competing products), and pH Alert lasts up to 4 times as long as competing products.Does it read total or free ammonia? Ammonia Alert reads only the toxic free ammonia, changing reversibly from yellow to green to blue relative to concentration and detecting less than 0.05 mg/L.
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