$Red Sea Seawater Refractometer - Accurate Salinity Measure$

Red Sea Seawater Refractometer - Accurate Salinity Measure

M251S

$52.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Red Sea Seawater Refractometer - Accurate Salinity MeasureThe Red Sea Refractometer R12018 is an advanced instrument designed specifically for measuring the absolute salinity of seawater at a standard reef aquarium temperature of 25C (77F). This precision device eliminates the need for seawater or temperature compensation factors, as it is calibrated precisely for natural seawater (NSW). Unlike traditional refractometers that are typically calibrated for brine (NaCl solutions), the Red Sea Refractometer

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I have been using a ball launcher to exercise my Border Collie. Up till now I have been using the launcher to throw tennis balls. Even with the launcher I can only throw the balls a couple of hundred feet. These balls go MUCH further. I am using a steep horse pasture to throw the balls and I have to make sure that I don't launch them past the fence at the end of the pasture. I think the thing that makes them go further is their weight combined with a smooth surface. They also have incredible bonce. They hit and just shoot way up into the air. Also, the tennis balls I was using were green. In my horse pasture they were easy for the Collie to miss since they blended right in to the grass. These balls with the orange with blue stripes are far easier for the dog to find. It's really hard to tire out a Border Collie but these balls do the job.

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Reviewed in the United States on January 15, 2026

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Carla

Boise, US

★★★★★ 5

Great fun for retrievers

Size: Medium, Style: Medium (4 Pack)

Great durable balls. Use these with or without the thrower. Lab puppy loves to play fetch and these are easy to spot in the yard. Our neighbor has 2 pit bulls who also plays with them. Will buy them again if need be.

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Reviewed in the United States on May 27, 2026

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Barbara

Birmingham, US

★★★★★ 5

Dogs love them

Size: Medium, Style: Medium (4 Pack)

These balls last! Dogs love them!

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Reviewed in the United States on April 27, 2026