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robinscp

A warning about hydrometers.

40 posts in this topic

Spotted this on another forum.

 

The following picture is a hydrometer full of cold tap water!!! :eusa_whistle:

 

DSC00374.jpg

 

That's why a refractometer is an essential bit of kit.

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deffo right there craig.

 

i started with one of those red sea hydrometers & was dissatisfied with that so bought an aqua medic electronic sg meter which caused me a lot of problems as it calibrated incorrectly (unbeknown to me for 18 months) the wife would say "is the salt level ok" & "of course it was" was the reply. over 18 months the salinity crept up & up. problem solved now with a refractometer.

 

echoing craigs message here "if you do not own a refractometer then think about buying one asap"

 

bill

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It's scary to still hear so many people still using these

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i had one of these. it had my salt at 1.23 nev checked my water for me and it was 1.29 :eusa_whistle:

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i've never had one of those.

got a refractometer from the start :D

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See the temp as well. :eusa_whistle:

 

This was straight out of the cold tap.

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See the temp as well. :eusa_whistle:

 

This was straight out of the cold tap.

 

I was just gonna say that thier cold water dont look too cold....lol

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I always used to use a floating hydrometer (like those used in beer making) & I found that to be inaccurate as well! I use a refractometer now with no problems. Please note though that when you get one, check it against the shops own 'cos I have also had a faulty refractometer in the past as well!

 

Andi :eusa_whistle:

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I always used to use a floating hydrometer (like those used in beer making) & I found that to be inaccurate as well! I use a refractometer now with no problems. Please note though that when you get one, check it against the shops own 'cos I have also had a faulty refractometer in the past as well!

 

Andi :hello:

 

yep too right. after my trials & tribulations with salinity i got them to do this also before leaving the shop.

 

bill

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There is nothing wrong with floating hydrometers, so long as they're a decent make and used correctly ie temp corrected. Floating hydrometers should be far more reliable and accurate than refractometers but unfortunately hobby ones just aren't made as well as they should. I do use a refractometer myself because it's a little easier, but at work I'd trust a hydrometer ahead of a refractometer. Another thing to bear in mind refractometers aren't fool proof, they really should be calibrated/checked occasionally, even if they read RO at zero they could be out when you get upto 3.5%.

 

Those swingarms do seam like a total waste of time though, you'd be just as well of judging by taste :hello:

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Those swingarms do seam like a total waste of time though, you'd be just as well of judging by taste :hello:
Thats my secret out then

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Jason where did you get your pinpoint solution from?

 

 

I have tried to get some and was un-successful.

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They don't call me little Hitler for nothing. :hello: :lol: :lol:

 

I think first stop sell them as well.

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i had one of these. it had my salt at 1.23 nev checked my water for me and it was 1.29 :lol:

 

Your lucky,

I bought one from a non sponser and it was hell trying to get it to work properly, kept saying I had really low salt levels so being a newbie and just starting to add water / salt to the tank I kept piling the salt in. Enough was enough so took it back for a refund and to get a refractometer instead which worked a treat, from memory I think I was on 1.5 sommit :lol:

 

Took loads of trips to LFS with tubs full on unsalted RO to get it balanced and back to normal, what a waste, didn't think to keep any of it, just threw it away as it was over salted until Pingu said to keep it and just dilute it down when I needed to do another water change - DOH! Why didn't I think of that :hello:

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just bumping this for any new reef keeper's.

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