Tropical Fish Keeping - Aquarium fish care and resources

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mrairportjunke 05-27-2007 04:24 PM

salinaty and specific gravity
ok. i have a living sea 8" hydrometer plus and a instant ocean hydrometer. when i use them i get different readings from the too. I get like a 1.006 on the thermometer one and the one you fill up shows 1.012. exactly how am i suppose to fill it up. does that matter or what? and second which one is correct or am i doin something wrong????

by the way im new to the site so hi to all.

usmc121581 05-29-2007 07:27 AM

How old are they. One could be out of calibration. The one you fill up could have bubbles on the needle. Believe me the tiniest bubble on there can interfere with results. You fill it up by slowly putting it in the water till it is completly filled.

caferacermike 05-30-2007 06:49 AM

Swing hydrometers are garbage. Only used as a reference point. Tropic Marin makes one of the best thermometer/hydrometer combos. Refractometers are also very accurate.

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