Features a special design that snails can crawl inside the center only. Naturally catch snails and avoid harmful medication for your fish and plants. With air hole design allows air to escape quickly to aid sinking. Really clever design which comes with bait and monofilament line for easy removal from aquarium.
- Measures nitrate levels on both fresh and saltwater aquariums.
- High levels of nitrate are a food source for unwanted algae and indicate poor water quality and health problems for fish.
- Tests nitrate levels from 0 to 160ppm