View Full Version : High Salinity

05/09/2011, 10:05 AM
Okay I posted before about how my salinity kept dropping like crazy everyday. Well it turned out that leaving the lid to my skimmer was the culprit as when the water level changed and the bubbles moved up they popped and spashed water inside the general vicinity of my sump area. Putting the lid back on fixed the issue. Now I have a new issue. I bought


this from FireReef (thanks Tanu) on Saturday. Since its installation it has been doing an incredible job. I did notice yesterday, however, checking my salinity I was at 1.026. Woke up this morning and rechecked it and its now 1.028. This has to be correct cause I calibrated with the 35ppt solution and one baby head of pink FS is trying to detach itself from its skeletal base as a sign of stress. I have removed 2 gallons of water from my sump and allowed the ATO to refill and I will recheck salinity again in 2 hours.

So my question is... I have an ATO that works cause my return pump cahmber is at a certain level that never goes down. Water temp is at 79.5 and gets as high as 80.5. The only thing I have done to this tank is as follows:

1) On Friday I got 60lbs of LR with a bunch of corals on it and I added to my tank.
2) I bought the ATI BM300 on Saturday and installed it.
3) I removed the lids from my top tank cause of the 80.5 degrees. I also installed a clip on fan in the sump


to help with temperature swings. I also noticed condenstation inside the skimmer cup I first thought this would attribute to the increase salinity issue but then again I have a functioning ATO. I want to say its evaporation but if thats the case why isnt the ATO compensating? Thanks for any insight guys/gals!

05/09/2011, 10:12 AM
When you put that larger skimmer in the sump, it displaced some more water, making the level at the ATO float higher than normal. If that wasn't removed, it evaporated but didn't get replinished because it wasn't down to the ATO float yet.

Randy Holmes-Farley
05/09/2011, 10:33 AM
That sounds logical.

What do you estimate the total water volume to be?

05/09/2011, 10:58 AM
I would say 300 gallons or less. But when I put the 60 lbs of roks in I never removed water cause I thought about the skimmer displacement, but on the other hand I have no other logical explaination so if thats the case Ill slowly lower the salinity. Thanks guys!

Randy Holmes-Farley
05/09/2011, 11:37 AM
Removing 2 gallons of water per day and replacing with RO/DI will have it on track in a week or so. :)

05/09/2011, 12:44 PM
Maybe sooner lol. I removed 2 gallons already and it dropped to 1.027 so Ill remove another 2 gallons tomorrow.

Randy Holmes-Farley
05/09/2011, 04:37 PM
If true, then your water volume is a lot lower than 300 gallons, or else the 1.028 was off. :)

2 gallons replaced in 300 gallons of sg = 1.028 will drop the sg to 1.0278. :)

05/09/2011, 08:38 PM
Ahaha probably 250ish then. Its a 225 gallon tank with a 75 gallon tank turned sump.

Randy Holmes-Farley
05/10/2011, 06:13 AM
OK, happy reefing. :)