Tropical Fish Keeping - Aquarium fish care and resources

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-   -   Hydrometer (

Rogergolf66 01-29-2007 12:32 PM

I was wondering I have 2 hydrometers one I have been using for a year or so and one that I got with a new tank I bought. for the hell of it I put the same water in both hydrometers and as you can see I didn't get the same reading. I checked there are no bubbles on either meter.

Does anybody know what one I should use. the difference is a good amount .002

usmc121581 01-29-2007 01:40 PM

Did you let them bothe soak in warm water to get the deposits of then read. If so go with the IO hydrometer. I have seen that with the sea test nes dozens of times. Every time they read high but yours is reading lower thats a first.

Rogergolf66 01-29-2007 01:46 PM

Thanks I will try the warm water thing. but the IO is reading higher not lower.

usmc121581 01-29-2007 01:55 PM

I seen that usaully ever time I seen that it would be the other way around. But usaully ever now and then you have to soak them in warm water for 15 mins because salt will dry on the needle and mess u the reading.

Rogergolf66 01-29-2007 02:27 PM

well i soaked them and this is the new reading what one do you recommend I go with.


usmc121581 01-29-2007 02:35 PM

I would go with the IO one because I use that with a floating one in my sump and they are both dead one. But didnt you say one was used and one was new. I would use the new one for now. and next time you go to your LFS bring both of them and test them against theres and see which one is closest to what they read on these. Sorry could've of been better help.

caferacermike 01-29-2007 04:00 PM

ALL swing hydrometers are very inaccurate. Refractometers are the best choice and not to expensive at around $50.

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