Coralife Deep Six Hydrometer Wide Range Specific Gravity Meter

Coralife Deep Six Hydrometer wide range specific gravity meter.

• Easy to read and accurate to +/- 0.001 specific
• Designed to give temperature -corrected readings in warm water aquariums 68 - 85 F
• Read specific gravity on inside scale and salinity in parts per thousand (ppt) on outside scale