Reef Central Online Community

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > The Reef Chemistry Forum
Register Blogs FAQ Calendar Mark Forums Read

Notices

User Tag List

Reply
Thread Tools
Old Yesterday, 05:42 PM   #1
MarksReef
Registered Member
 
MarksReef's Avatar
 
Join Date: Feb 2002
Location: Rush, N.Y.
Posts: 4,021
Salinity calculator

90 gallons with a SG of 1.032
I want to be at 1.026
If I take out 4 or 5 gallons twice a day and replace with RODI, how long would it take?
Good plan to get back no normal?


__________________
93G Rimless Cube

Current Tank Info: 93G Rimless Cube
MarksReef is offline   Reply With Quote
Old Yesterday, 06:51 PM   #2
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,496
If that's 90 g of actual water volume, you would need to remove about 16 gallons of water. Personally, I'd do about 2 g per day via autotopoff, if I had a slow (peristaltic) pump, maybe in two shots. I'm assuming there are corals in the system, or other invertebrates (osmoconformers).


__________________
Jonathan Bertoni
bertoni is online now   Reply With Quote
Old Yesterday, 06:53 PM   #3
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,496
The math:

1.000 SG means no salt content, so
    .026 / .032 = .8125
is the amount of salt to keep.

So the amount of salt water to keep is:
    .8125 * 90 = 73.125


__________________
Jonathan Bertoni

Last edited by bertoni; Yesterday at 08:43 PM. Reason: typos fixed
bertoni is online now   Reply With Quote
Old Yesterday, 08:02 PM   #4
MarksReef
Registered Member
 
MarksReef's Avatar
 
Join Date: Feb 2002
Location: Rush, N.Y.
Posts: 4,021
Thanks you Bertoni

His did you get the = .8125 ?
Yes, about 90 G if water
Full reef.
I am using a litermeter for top off so I could take 3 gallons out every morning and have the litermeter replace in 24 hrs.
PS I donít recommend the IceCap salinity tester.


__________________
93G Rimless Cube

Current Tank Info: 93G Rimless Cube
MarksReef is offline   Reply With Quote
Old Yesterday, 08:44 PM   #5
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,496
Oops, typos fixed. Sigh! The tanks current SG is 1.032. The target is 1.026. 1.000 actually corresponds to zero salt, so you want to dilute down to .026/.032 of what is in the system, which is .8125.


__________________
Jonathan Bertoni
bertoni is online now   Reply With Quote
Reply

Thread Tools

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 On

Forum Jump


All times are GMT -6. The time now is 11:48 PM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright ©1999-2014
User Alert System provided by Advanced User Tagging v3.3.0 (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.