Maybe someone can shed some light on how to fix this. My current 90 gallon I keep at .26 sal. I usually have about 1-2 gallons of evap a day due to running a 8 inch fan on the top to keep the temp at 80.. After a few days my salinity goes up to .30-.33 which obviously isnt good. how can I keep my salinity at .26 the to poff water I use is r/o water with sal of .26.
-
Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
Salinity issues
- Thread starter MU8ST7ANG
- Start date
exactly. when your water evaporates it is pretty much just water ( no salt or minerals) they are heavier than air so donot evaporate. you should be topping off w/ 100% fresh r.o water, and doing your waterchanges with saltwater
MU8ST7ANG said:
How long have you been doing this?? I'm wondering why your salinity isnt off the charts.
hey there - just for future reference.
Salinity is measured in ppt - the correct value we try to get to is 35 ppt.
But specific gravity is measured in 1.026.
The way your post it written - the values seem like they are specific gravity.
With regards to the posts here - my only thought is that the skimmer takes out salty water. I realize it's only a cup or so - but if you constantly only put in 1.026 water and top off - eventually the salinity of the tank will decrease by every cup of saltwater being taken out via skimmer. Point being that you should take the time to check the SG every so often in the display. I like to run my skimmer wet and I get a large jug of water out every day.
I compensate by making my change over water a little bit over 1.026 SG. The other way would be to have a small amount of salt in the RO top off. Just a thought.
Salinity is measured in ppt - the correct value we try to get to is 35 ppt.
But specific gravity is measured in 1.026.
The way your post it written - the values seem like they are specific gravity.
With regards to the posts here - my only thought is that the skimmer takes out salty water. I realize it's only a cup or so - but if you constantly only put in 1.026 water and top off - eventually the salinity of the tank will decrease by every cup of saltwater being taken out via skimmer. Point being that you should take the time to check the SG every so often in the display. I like to run my skimmer wet and I get a large jug of water out every day.
I compensate by making my change over water a little bit over 1.026 SG. The other way would be to have a small amount of salt in the RO top off. Just a thought.
Hawkeye said:
Great advice but if you MUST use a swing arm hydrometer, make sure you take multiple measurments. ANY bubbles on the arm will throw it off.
There is nothing wrong with a swing arm once you know it's calibration.
Oh and salinity reading:
refractometers and salinity
homemade calibration standards
Oh and salinity reading:
refractometers and salinity
homemade calibration standards