Store credit going towards Apex Salinity Probe

Jyetman · 06/15/2015, 10:39 PM

Finally after six months of trading in frags got $100 store credit. Decided to add to my apex a salinity probe. Going one part at a time so bought the PM2 module first. Figure since I'm not spending cash on this add on and if its like many say unreliable no major loss. Hope I didn't make a mistake are they more reliable these days?

xdestry · 06/15/2015, 11:55 PM

It's not too exact honestly, I had a lot of problems with mine when I first got it and had to get it replaced. Sometimes if I moved it around it will shoot up to 45.. its useful for long term monitoring of the salinity to see if its going down or up but dont count on it being exactly 35, expect a 1 or 2 ppt difference from what a refractometer will show.

pciscott · 06/16/2015, 12:18 AM

The set point being dead on is not the beauty, it is showing a trend of going up and down and if it goes down rapidly you can set a alarm.

A tip on refractometers, keep a bottle of 35ppt reagent in each of your sumps to temp calibrate your refractometers as temp change can add up to large differences and you should calibrate them often.

oseymour · 06/16/2015, 05:02 AM

Also the probe is very susceptible to interference. Make sure that no cords go near the probe wires.

06/15/2015, 10:39 PM	#1
Jyetman Registered Member Join Date: Nov 2012 Location: Phoenix, AZ Posts: 1,712	Store credit going towards Apex Salinity Probe Finally after six months of trading in frags got $100 store credit. Decided to add to my apex a salinity probe. Going one part at a time so bought the PM2 module first. Figure since I'm not spending cash on this add on and if its like many say unreliable no major loss. Hope I didn't make a mistake are they more reliable these days?

06/15/2015, 11:55 PM	#2
xdestry SPS Addict Join Date: May 2014 Location: Pasadena, CA Posts: 662	It's not too exact honestly, I had a lot of problems with mine when I first got it and had to get it replaced. Sometimes if I moved it around it will shoot up to 45.. its useful for long term monitoring of the salinity to see if its going down or up but dont count on it being exactly 35, expect a 1 or 2 ppt difference from what a refractometer will show. __________________ 100 gallon MIXED / SPS frag dominant Current Tank Info: 100 Gallon + 40G Sump, ATI Sunpower Dimmable 8x39 (B+,C+,B+.Act.B+.P+.Gieseman Super Act, B+), 2x MP40QD, Aquamaxx Q2 + ConeS CO1 Skimmers

06/16/2015, 12:18 AM	#3
pciscott Pirates Cove Reef Join Date: Feb 2009 Location: Cypress, CA Posts: 2,582	The set point being dead on is not the beauty, it is showing a trend of going up and down and if it goes down rapidly you can set a alarm. A tip on refractometers, keep a bottle of 35ppt reagent in each of your sumps to temp calibrate your refractometers as temp change can add up to large differences and you should calibrate them often. __________________ Scott Steinberger SCMAS/SCRK/MASNA member There is more than One Way to skin a Reef! Current Tank Info: Pirates Cove 400 Gallon Peninsula with 10 Ecotech Gen 4 Pro Lights, SPS heavy mixed Reef, Tank Controlled by Apex back up monitoring by Profilux, Tropic Marin Pro Salt, Brightwell Suplements and Bio Bricks, Way too many Fish! Keep it simple!

06/16/2015, 05:02 AM	#4
oseymour Euphyllia Addict Join Date: May 2012 Location: Brooklyn, NY Posts: 1,424	Also the probe is very susceptible to interference. Make sure that no cords go near the probe wires. __________________ Just started Red Sea Reefer 350 (75 Gallon) Build Thread - http://www.reefcentral.com/forums/showthread.php?t=2555495 Current Tank Info: Red Sea Reefer 350