Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on
Old 01-27-2005, 09:27 PM   #1
Aquarium Advice FINatic
Join Date: Jan 2005
Location: Poughkeepsie, NY
Posts: 602
Dilution ratio for salt

Is there a formula for how to dilute or strengthen salt water? For example, to raise salinity by .1, is there an approx amount of salt to add per unit of water? (And vice versa for lowering salinity.)

I'm preparing my salt water as I type this.

30 gal standard 55 lbs LR, 60 lb live sand, 10 gal sump/refugium. Urchin skimmer, mag7 pump, 3 x 96W PC combination 10,000K/actinic bulb, 2 blue LED moonlights
SG 1.024, temp 79.5, pH 8.4

Livestock I added:

1 skunk cleaner. 12 hermits: red, scarlet, blue. 15 or so assorted snails. Discosomas, Ricordia, Rhodactis mushroom corals, chaetomorpha (sump), 1 feather duster, Montipora digitata, Montipora capricornis, Montipora hispids. assorted zoos, Xenia, Kenya tree coral, green Sinularia, green star polyps, branching hammer coral, bubble coral, Devil's hand leather. Yellow chromis, purple firefish.

Hitchhikers: the usual suspects :crabs, bristles, urchin, mantis shrimp (now in exile in mantis tank)

List of possible/likely newcomers:

Feather duster. PJ cardinal, Bangghai cardinal, Firefish goby, Clownfish, Neon goby, Yellow watchman goby, Orchid dottyback. Various corals.
midiman is offline   Reply With Quote
Old 01-27-2005, 10:29 PM   #2
Aquarium Advice Freak
Join Date: May 2003
Location: California
Posts: 414
No it varies with salt. I use Oceanic and it is 6 little cups of for 32 gallon can. If i use iO it is more like 7 or 8 to get it to 1.023.

I experimented and got it right after trial and error. Now that I am reading about bad things of oceanic salt I may have to reformulate my mixture.

tmcpeek is offline   Reply With Quote
Old 02-02-2005, 02:57 PM   #3
Aquarium Advice Newbie
Join Date: Feb 2005
Location: Lompoc, CA
Posts: 5
Send a message via Yahoo to fasted64
As tmcpeek said, it varies with the type of salt.

I use Oceanic as tmcpeek did and you will be very very close to 1.021 if you use 2 1/2 cups per every 5 gallons. That should get you in the ballpark.

I do have one small tip as well. Lower salt content is better for disease control if you ever have that problem and if your animals can handle it. You can in some cases go down to 1.017, but never do it overnight. If ever a change is required, you need to do it slowley over a week or two week period. I run typically at 1.020 and never had any problems.
Edward York
Lompoc, California
fasted64 is offline   Reply With Quote
Old 02-02-2005, 03:03 PM   #4
Aquarium Advice Addict
Join Date: Oct 2004
Location: NJ
Posts: 2,111
Slightly lower levels might be ok for FO, but for inverts and corals, you're going to want to keep it a bit higher and do hyposalinity in QT to preserve the life on your rocks and such. Prolonged low salt is also not good for the long term survival of your fish.

With Reef Crystals I put in 1/2 cup per g of water. That gets me right around 1.023/24. As far as how much salt is required to increase the salt content by .01, I'm not sure. When I need to raise the salinity in my main I top off with SW instead of fresh until I get to where I'm going. You can go down faster than you can go up and better safe than sorry. If I needed to lower it a little I'd do my next few water changes with 1.021/22 water. I'd just put 2 cups less salt in my 20g bucket of water and see where that took me to. Adjust accordingly afterwards.

Join the NJ Reef Club Today! Saving the world's reefs one living room at a time!
MACNA XXI Atlantic City, NJ September 25-27, 2009
Phyl is offline   Reply With Quote
Old 02-02-2005, 03:16 PM   #5
Aquarium Advice Freak
Join Date: Jan 2005
Location: Brandon Fl
Posts: 396
Just curious what have you heard bad about Oceanic?
90 gal sw
Wet/Dry w/ LR ruble
2x Maxi-Jet 1200 Power Head
PC Lighting
Remora pro skimmer
90 lbs LR
80 lbs of Carib Sea

Majestic Angel, Pink spotted gobie. Black percular clown, Coral Beauty, Lt. Tang, Mitratus B/F, Multicolor Dwarf Angelfish
sango is offline   Reply With Quote
Old 02-02-2005, 04:01 PM   #6
Aquarium Advice Freak
Join Date: May 2003
Location: California
Posts: 414
I have heard that it has low ph. I have not experienced this. I mix it to 1.023 and it is always at 8.2. I am on my 4th 200 gallon bucket and have not had any issues. I do not add any trace elements and my shrimp molt just fine. Maybe I am lucky but I do still check my water for changes before it goes in the tank.

tmcpeek is offline   Reply With Quote


Please support our sponsors and let them know you heard about them on

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
salt to egg ratio? Susie Q Saltwater Fish Only & FOWLR 0 08-31-2008 08:14 PM
Serial Dilution joannde Freshwater & Brackish - General Discussion 2 05-02-2006 02:37 PM
looking for gravel ratio diggy415 Freshwater & Brackish - General Discussion 6 07-03-2005 05:07 PM
LR Displacement Ratio OneBowl Saltwater Reef Aquaria 6 10-28-2004 11:23 AM
lr ratio? Mghslowell Saltwater & Reef - Getting Started 4 06-19-2003 03:54 PM

» Photo Contest Winners

All times are GMT -4. The time now is 04:30 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.