lowering salinity

saltcreeper · 03/12/2008, 01:47 PM

Have a system that is aproximatley 525 gallons. We added all the live rock and sand and added 8 50 gallon mix bags to the system after letting it run and mix completly I tested it with my refractomer and it reads 1.032. I want the salinity at 1.025. My question is how much saltwater do I need to drain and replace with RODI water to bring it down to that salinity. Is there a calculator online anywhere?

syded70 · 03/12/2008, 02:24 PM

Sorry but I cant answer your question directly, i can answer with experience that i had in lowering salinity. Remove i gallon of saltwater, replace one gallon with RO/DI....SLLLOOOOWWWLY, fish and inverts dont like quick changes.....lost livestock when i did this to quick....i know this is not the complete answer but good luck

Randy Holmes-Farley · 03/12/2008, 02:31 PM

To drop a sg of 1.032 to 1.025, you'll have to replace 22% of the actual water volume with fresh water. In essence, that is 0.78 x 32 = 25. It may seem odd, but that works out OK.

03/12/2008, 01:47 PM	#1
saltcreeper Registered Member Join Date: Feb 2002 Location: Moore, Oklahoma Posts: 139	lowering salinity Have a system that is aproximatley 525 gallons. We added all the live rock and sand and added 8 50 gallon mix bags to the system after letting it run and mix completly I tested it with my refractomer and it reads 1.032. I want the salinity at 1.025. My question is how much saltwater do I need to drain and replace with RODI water to bring it down to that salinity. Is there a calculator online anywhere?

03/12/2008, 02:24 PM	#2
syded70 Registered Member Join Date: Sep 2005 Location: Outside of a glass box full of water Posts: 112	Sorry but I cant answer your question directly, i can answer with experience that i had in lowering salinity. Remove i gallon of saltwater, replace one gallon with RO/DI....SLLLOOOOWWWLY, fish and inverts dont like quick changes.....lost livestock when i did this to quick....i know this is not the complete answer but good luck __________________ 2 fish are swimming along. 1 of the fish runs into a stone wall and says "dam". Current Tank Info: 180 Gallon Drilled Tank with 55 Gallon Sump The Sump has 1/3 DSB w/ pleneum. I also have an old wet/dry sump used for a fuge where I house sps, lps, cheato. This is under a 96 Watt 20" PC, Coralife.

03/12/2008, 02:31 PM	#3
Randy Holmes-Farley Reef Chemist Join Date: Apr 2001 Location: Arlington, Massachusetts Posts: 81,937	To drop a sg of 1.032 to 1.025, you'll have to replace 22% of the actual water volume with fresh water. In essence, that is 0.78 x 32 = 25. It may seem odd, but that works out OK. __________________ Randy Holmes-Farley Club 65535 Current Tank Info: 120 mixed reef