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API Ammonia Fresh Water & Saltwater Aquarium Test Strips quickly and easily checks your aquarium's ammonia levels. Fish continually release ammonia into the aquarium through their gills, urine and solid waste. Uneaten food and decaying organic matter also add ammonia to the water. Ammonia is toxic to fish and can cause gill damage, stress and death. Regular testing is recommended because ammonia levels can build quickly due to fish waste and uneaten food. Safe for use in fresh and salt water. Features: Monitors water quality and prevents invisible water problems that can be harmful to fish Dip test strips into aquarium water and check colours for fast and accurate results Use: Simply dip the test strip into the water, then compare the results with the precise, easy-to-read colour-coded chart to determine if any action should be taken. The chart includes recommendations on how to treat the water and neutralize ammonia.

Mixing functionality with convenience, the Carlson Extra Tall Walk-Thru Pet Gate features a 100% steel frame, that installs in minutes. The assembly gate, comes in three pieces and easily assembles with a few screws. Because we know that putting holes in your wall may not be an option, each of the four pressure mounts can be adjusted to create a stable and secure fit. If you'd prefer to hardware mount, the included wall cups will help you attach it to the wall. Standing an impressive 36" tall, the Extra Tall Walk Through Pet Gate is a perfect height for the dog that likes to jump or to keep larger dogs contained. To help you fit the wide variety of door and hallway openings throughout your home, the gate is easily expandable to fit a range of areas between 29"-36.5". More extensions (above and beyond what is included) can be added to accommodate wider spaces. Additional extensions are sold separately. Maximum of three extensions on the gate. A key feature to this pet gate is the the ability to walk through. Simply push the safety button and slide the handle. With a 16" door opening there is space for you to walk through - because no one wants to step over a 36" gate every time they need to pass. We care about your pets too, so they are afforded the same convenience as the gate also features a 8" x 8" pet door allowing your small animal to pass through easily. When you need to take your gate down, the Carlson Extra Tall Walk-Thru Pet Gate is lightweight, portable and stows flat - making it easy to shove in your closet before guests arrive or pack along when traveling with your pets.