Instant Ocean Testing Hydrometer for Aquariums, 1 count
$7.59Chewy Price
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$11.99Chewy Price
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$4.40
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$7.21Autoship Price
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About This Item
- Helps you reach correct salt level with a clear marked safe zone
- Makes the difficult task of reaching the correct salt level in your marine aquarium much easier to use and read
- Maintains the right level is vital to creating and maintaining a thriving marine environment
- Reliable tool that provides full-range salinity and specific gravity readings, and it’s accurate to ± 0.001
- Hands stay dry when filling while testing aquarium salt level and specific gravity
Learn More About Instant Ocean From Our Team of Experts
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| Price | $7.59Chewy Price | $6.82Chewy Price | $7.68Chewy Price | $9.12Chewy Price | $5.98Chewy Price |
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| Fish Type | Marine Fish | Tropical Freshwater, Betta, Cichlid, Goldfish, Marine Fish | Marine Fish, Tropical Freshwater, Betta... | Marine Fish, Marine Invertebrate | Tropical Freshwater, Marine Fish, Betta... |
| Aquarium Type | Saltwater | Freshwater, Saltwater | Freshwater, Saltwater | Saltwater | Freshwater, Saltwater |
3 Customer Questions
what the
selenium level be for brackish water
Answer by • Dec 15, 2019
The world’s marine waters have a salinity between 32 and 35 parts per thousand. Brackish water, by definition, must be lower than the lowest value of this range. Many freshwater aquarium species can withstand (or benefit from, according to some) a certain level of salinity in their tank water. Calculating the salinity of water is done by measuring specific gravity (SG) with a hydrometer, or alternatively, conductivity via a meter. Both of these methods are temperature dependent – readings vary with the warmth of the water. For practical purposes, brackish aquarium water should range between 1.002 to 1.022 SG at a temperature of 77 degrees Fahrenheit. Most brackish aquarium fish can tolerate this range. A 50/50 mix of fresh and marine water would provide a salinity of 1.012 SG – a happy medium for a general brackish aquarium.
How does this hydrometer take into account water temperature?
Answer by • Apr 02, 2018
The hydrometer doesn't take into account the water temperature. It will read the salinity and specific gravity accurately at temperatures between 68 and 85 degrees Fahrenheit.
What's the lowest reading on the hydrometer?
Needing to use this to slowly increase salt to acclimate tank from freshwater to brackish
Need low reading of .002
Will this work ?
And if not
Do you sell refractometers?
Answer by • Jan 09, 2018
The lowest reading is 0 - 1.000. The Hydrometer is normally used for saltwater tanks so it has higher level readings, depending on how high the brackish level is it may not work. At this time we don't carry refractometers.