The Seachem Alert Combo pack is a revolutionary way to keep tabs on your aquariums essential levels. This unique tester provides continuous pH and ammonia readings for up to 6 months, eliminating the need for strips and complicated tests.

• Continuous freshwater pH and ammonia readings
• No strips, no tests, just constant readings
• Up to 6 months of constant monitoring

Alert Combo is easy to use: just place each reader somewhere visible in your aquarium, and you're done! After only a few minutes the readers will automatically detect and display your water's pH and ammonia levels using a simple color-coded system, and will continuously update every 10 minutes after that. No care is required beyond removing any algae accumulation with a clean, soft material.

Ammonia Alert works in freshwater and marine aquariums, and provides continuous readings for up to 1 year. pH Alert works only in freshwater aquariums, and provides continuous readings of pH levels between 5.4 and 8.0 for 3-6 months.