VIDEO: Measuring Salinity and Why It's Important Learn the importance of maintaining salinity within acceptable ranges for livestock, tips on how to keep it steady and tools to measure the salinity in your tank.

So after seeing some sluggish corals I ran down to my local LFS. He tested everything under the sun for me and all came back ok. On a hunch he brought out his refractomer and found the SG was around 1.020 to 1.021 which was a surprise because going by my hydrometer the sg showed around 1.026...

A collection of threads that deal with salinity or Specific Gravity (S.G.). Salinity question

Hi guys, Any body have any advice on which brand of hydrometer to use?? I have had 2 Kent hydrometers and both have leaked water after a couple of uses making the reading inaccurate!! Not sure I want another Kent however not sure which brand to buy next.

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This is most likely here somewhere in the forums, but I am posting this anyway. I recently went through a major issue with my tank when my hydrometer malfunctioned and was reporting my salinity at 32.5 with a SG of 1.024 but actual was 40 salinity at 1.029. I figured out the problem when I...

Hey guys.. Just wanted to throw this out there. I know its been discussed here before but I wanted to add my story to the pile. I have had a reef for about a year now in my home. I'm loving every minute of it but I have learned some HARD lessons. One in particular I'm gonna share right now...

After testing with my Coralife swing arm hydrometer for over a year now, Ive noticed some issues and decided to test some tapwater in my hydrometer to see if its reading right. It measured .0004 so does that mean I can just subtract that from my SW reading??

I recently filled up my tank from LFS water (no RO/DI unit yet) and the SG is reading at 1.018 with an instant ocean hydrometer I just purchased. Are these hydrometers reliable? Refractometer isn't in the budget for a while.

Hi so I got my first new refractometer in the mail from ebay yesterday. I have been trying so hard to calibrate it. I bought the solution that is 35sg and 1.026 salinity. When I put the fluid on it, it read at 1.029, the refractometer has one screw and whichever way i turn it nothing happens to...

Using a Kent hydrometer, it gives very different readings when used in the same tank. Almost every measurement gives a different reading, sometimes dramatically different. What could cause this? Is it possible that my salt mix (instant ocean) isnt fully mixed up and therefore different areas of...

So...how many of you guys use refractometers and how many trust the swing arms?

so I have my 1st saltwater tank setup and I added water and went to check the salinity and my hydrometer reads near undetectable. I used the proper amount of salt but cant understand why its doing this. PLEASE HELP!

Hi I have a ten gallon nano and it seems like my salinity levels keep getting up to 1.026. It seems like I have to keep adding RO water to keep it in the norm, is this normal? Is there anything I should be doing different?

Hello, I am about to setup a marine fish only tank. I was looking for a good quality Hydrometer and did some looking around. If I buy a hydrometer with the following will it work Gravity Hydrometers calibrated at 60 F / 60 F. RANGE DIVISION...

Hi, I want to purchase a refractometer (or just something that can measure accurate specific gravity/salinity). The reviews of all of the units are so mixed though! Does anyone know of a well built refractometer that will not fall apart, give an accurate reading, and not have to be calibrated...

ok so i have 2 different hydrometers, the 1 I've been using for a year and the 1 my aunt just got me for Xmas. i asked her to get me a new 1 because i havent really thought i've been getting the most accurate readings from my old 1 because when i bought it there was a thin crack in it and when...

I am working on starting up my tank and getting the SG up to where I would like it, around 1.025. I have no living items in the tank right now I am using instant Ocean salt and mixing that with RODI water When following the directions on the bag I am getting around 1.020 SG. Should I assume...

Hello Friends. Im Hassan from Qatar. I just changed my whole freshwater tank to Marine water. my hydrometer shows salinity level as 1.022 ... is this normal? and another question about Protein Skimmer, my protein skimmer isnt collecting dried foams. its wet and i have to clean the waste box...