TDS is an abbreviation for Total Dissolved Solids. You can measure the amount of total dissolved solids using a TDS pen/meter. Shrimp keepers use a TDS meter to check how pure their reverse osmosis or RO/DI water is after it has been filtered. Using a TDS pen/meter can indicate when it is time to replace the filters in your RO or RO/DI system or if you have purchased a bad batch of water from your local fish shop.
Temperature for Opae ula tank purposes, temperature refers to how hot or cold the tank water is. We measure temperature in degrees Fahrenheit (°F) or degrees Celsius (°C). While keeping shrimp it's important to have slow temperature variances. Temperature swings in either direction that are too drastic can be quite stressful for the Opae ula shrimp. An aquarium heater and aquarium chiller are used to keep the tank water within a certain range.
This refers to an electrical device that incorporates an internal clock to turn the devices on/off which it is plugged into. Its highly recommend to use a timer for your aquarium lights.
This refers to the amount of water flow through a filter or the total amount of water movement within the tank. For example, if your filter is rated at 300 GPH and you have a 55 gallon aquarium, your turn over rate is 5.5. This simply means that you "turn over" the tank water 5.5 times per hour.
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