Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater & Reef - Getting Started
Click Here to Login

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 04-14-2005, 10:44 AM   #1
Aquarium Advice FINatic
Join Date: Jan 2005
Location: So-Cal
Posts: 640
Topping off w/ RO; Diluting nutrients??

I top off with RO about every other day in my 55 gal. Last night my SG was a bit high (1.029) so I emptied about 3-4 gal and replaced it with 5 gal RO and my SG is about 1.026 now.

With topping off of 5%-10% like this, is this diluting my nutrients? Should I supplement when I top off? Thanks all!

runway1 is offline   Reply With Quote
Old 04-14-2005, 10:50 AM   #2
Aquarium Advice Addict
Join Date: May 2004
Location: Poughkeepsie, NY
Posts: 3,294
It shoud not effect the tank nutrients IMO. My question is how long did you take to lower the SG? dropping 3 points in a short period otf time could cause stress on the fish and inverts.
Check you calcium and alkalinity and adjust them if needed and the other nutrients will be repalced in your next water change.

9/02-125 REEF, 125 lbs LR,LS 4x160 VHO, Reef Devil /Sump, Fuge
7/03-55 FOWLR 60lb LR, 50 lb SD sand 2x40 NO strip light, Reef Devil/sump, Fuge

TANK PICS http://www.aquariumadvice.com/viewtopic.php?t=98202
seaham358 is offline   Reply With Quote
Old 04-14-2005, 12:30 PM   #3
Aquarium Advice Addict
Join Date: Dec 2003
Location: Nebraska, USA
Posts: 6,703
the only thing that evaporates is water, thus top-offs with RO water are the best.

However, what you did wasn't a top-off, you did a small water change and replaced with freshwater because your SG was too high. With true top-offs, SG stays stable. Depending on what you have in the tank, you may need a 2-part calcium/alkalinity system to maintain good levels, but that's really only important if you've got a reef setup, where the corals and inverts need specific level ranges of calcium and alk.
If you just have fish or fish & live rock, calcium and alk aren't crucial parameters to maintain...your normal water changes should keep them at sufficient levels for coraline growth.
Former advisor and planted tank geek...life's moved on though.
malkore is offline   Reply With Quote
Old 04-14-2005, 01:04 PM   #4
Aquarium Advice Freak
Join Date: Oct 2004
Location: Rolling meadows IL
Posts: 235
are you sure the levels were not elevated because of the evaporation? i keep my levels at 1.026 and if the level of water drops the salt raises...but then toping off brings it back....not sure how your salt levels climed so high unless there was salt in the water you were toping off?

sirfishmaster is offline   Reply With Quote

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

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Topping off sand bmdirks General Hardware/Equipment Discussion 2 04-26-2009 01:33 PM
Topping off - how to pairustwo Freshwater & Brackish - General Discussion 3 01-02-2008 10:33 AM
Water for topping off... Poisson Saltwater Reef Aquaria 6 05-11-2004 02:01 AM
Topping Off tank NASCAR_Dave Freshwater & Brackish - General Discussion 13 01-09-2004 01:45 PM
Topping Off pipermurphy Saltwater Reef Aquaria 1 06-12-2003 09:53 PM

» Photo Contest Winners

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 08:02 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.