Whats wrong with my Hydrometer???? - Tropical Fish Keeping - Aquarium fish care and resources
 
LinkBack Thread Tools
post #1 of 7 Old 01-08-2011, 12:44 AM Thread Starter
New Member
 
chimera779's Avatar
 
Exclamation Whats wrong with my Hydrometer????

I have hydrometer and its been saying my specific gravity levels are 1.025 Which is fine with me so i left it at that for a week or 2 and now i borrowed a refractometer from a friend and it read 1.018!!! So this whole time i been thinking the hydrometer is correct. But how could the refractometer be wrong?? So which one is more correct i need help soon thanks!
chimera779 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 01-08-2011, 09:34 AM
Member
 
cbirk's Avatar
 
refractometers are more accurate. hydrometers are subject to mis reading, and errors that can arise such as having bubbles in the swing arm. What exactly can go wrong is dependent on the kind of hydrometer you have. Thats about the limit to my knowledge however, so hopefully someone else can go a little more indepth.

  • 55 Gal x2, 30 Gal, 20 Gal, 20 Long, 10 Gal x 3, 2.5 Gal, 1 Gal
  • 4 Beta's, 3 Pleco's, 4 Convicts, 4 Fire Belly Toads, 4 Serpe Tetras, 3 Angel Fish, 5 Tiger Barbs, 2 Rosey Barbs, 2 Cherry Barbs, 2 Odessa Barbs, 2 YoYo Loaches, 3 Ottos, 2 Yellow Labs, 2 Snails, 1 Black Tiger Barb, 1 Pictus Cat, 1 Balla Shark, 1 Rainbow Shark, 1 Ghost Shrimp, 1 Oscar, 2 Chinease Algea Eater,2 Tadpoles
  • 4 Ferrets,3 Gerbils, 2 Cats, 1 Dog
  • 1 Child, 1 Girlfriend
cbirk is offline  
The Following User Says Thank You to cbirk For This Useful Post:
chimera779 (01-08-2011)
post #3 of 7 Old 01-08-2011, 11:18 AM
Quote:
Originally Posted by chimera779 View Post
I have hydrometer and its been saying my specific gravity levels are 1.025 Which is fine with me so i left it at that for a week or 2 and now i borrowed a refractometer from a friend and it read 1.018!!! So this whole time i been thinking the hydrometer is correct. But how could the refractometer be wrong?? So which one is more correct i need help soon thanks!

optical refractrometers are more accurate than swing arm hydrometerss but thats no to say the swing arm isn't any good!. To use the swing arm make sure there are no tiny (and i mean tiny, so look closely) bubbles on the swing arm. You also need to clean it with fresh water after every use otherwise salt will eventually stick to the arm. When i use to use a swing arm i would use a tooth pick and tap/scrape the arm to get rid of any tiny bubbles on the arm when measuring the salinity. Usually after doing this you'll record a different measurement before and after that process. however, the best way to measure salinity is to use the optical version but make sure you clean the glass with fresh water otherwise salt buildup will occur there too

100 Gal SPS Rimless, 2X250 Watt + 4T5's Giesemann infinity, Bubble King Mini 200 skimmer, Ca reactor, DIY Kalk Reactor. See my Reef aquarium in HD video http://www.fishtanks.net/fishtank.php?fishtank=2207.

Last edited by reefsahoy; 01-08-2011 at 11:28 AM.
reefsahoy is offline  
The Following User Says Thank You to reefsahoy For This Useful Post:
chimera779 (01-08-2011)
post #4 of 7 Old 01-08-2011, 11:50 AM Thread Starter
New Member
 
chimera779's Avatar
 
okayy yeah the thing i had my hydrometer for a few years and i never knew to like clean it off and i didn't know there were bubbles on it either...so i must of been mis reading that thing for a long time luckly i just started my reef tank and ill keep using the refractometer cause i even used a newer hydrometer and it still read what above the charts..but i cleaned the glass of the refractometer n used it n it said 1.022 instead of the hydrometer which read 1.026 so ill have to invest in buying my own soon thanks
chimera779 is offline  
post #5 of 7 Old 01-08-2011, 11:59 AM
Member
 
cbirk's Avatar
 
yeah, from what I have read, depending on what hydrometer you have, it can be off by up to .06

  • 55 Gal x2, 30 Gal, 20 Gal, 20 Long, 10 Gal x 3, 2.5 Gal, 1 Gal
  • 4 Beta's, 3 Pleco's, 4 Convicts, 4 Fire Belly Toads, 4 Serpe Tetras, 3 Angel Fish, 5 Tiger Barbs, 2 Rosey Barbs, 2 Cherry Barbs, 2 Odessa Barbs, 2 YoYo Loaches, 3 Ottos, 2 Yellow Labs, 2 Snails, 1 Black Tiger Barb, 1 Pictus Cat, 1 Balla Shark, 1 Rainbow Shark, 1 Ghost Shrimp, 1 Oscar, 2 Chinease Algea Eater,2 Tadpoles
  • 4 Ferrets,3 Gerbils, 2 Cats, 1 Dog
  • 1 Child, 1 Girlfriend
cbirk is offline  
post #6 of 7 Old 01-08-2011, 12:07 PM Thread Starter
New Member
 
chimera779's Avatar
 
yeah like thats insane!!! i have a reef tank now and i cant be wronggg otherwise i heard you can have major problems down the line if u dont keep your specific gravity levels between 1.023 and 1.025
chimera779 is offline  
post #7 of 7 Old 01-13-2011, 09:22 AM
New Member
 
njudson's Avatar
 
just for the sake of information. Refractometers can be wrong too, they tend to drift and need to be re calibrated periodically
njudson is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
whats wrong with him? shaylamcheers Tropical Fish Diseases 1 06-30-2008 03:31 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome