Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Fish Only & FOWLR

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 10-25-2011, 11:26 PM   #1
Aquarium Advice Apprentice
Join Date: Oct 2011
Location: New York
Posts: 28
Inherited a 10 year old SWFO tank and need help!

Hi all!

Thanks for taking the time to help a beginner!

3 months ago I bought a new home that came w a 10 year old 65 gallon SW FO tank. My main problem has been a recurrent layer of black stuff that blankets on the bottom of the tank. based on what I have read I assume it is a cyanobacteria. It peels right off and I can clean it out, but it will grow back fairly quickly. I have removed all the larger rocks and scrubbed them clean twice now. My nitrates hover between 10 to 25 ppm. My phosphates are around 2.5 to 5 ppm. The pH hovers between 8.0 and 8.3. Ammonia is negative. I recently bought an RODI filter and have been doing weekly 15 gallon water changes for the past 3 weeks, but the nitrates dont seem to be dropping. I added the whisper AP150 and the SEIO 1000 to help move the water too. I read somewhere that the wet dry filters can often trap nitrates and I'm wondering if that is my problem (or at least one of them!). There is a bunch of tan colored slimey stuff all over the bioballs in the filter and Im not sure if that is good or bad! I feed 1 packet of blood worms a day for the 4 fish. Have I forgotten anything?

Thanks again!!!

Djangom is offline   Reply With Quote
Old 10-26-2011, 12:13 AM   #2
Aquarium Advice FINatic
Join Date: Feb 2011
Posts: 640
Is it a black sludge? The reason I ask I was just reading up on vodka dosing for reef tanks, long story short the black sludge could be from an increase in bacteria. I won't go into grave detail but what I would do since your nitrate and phosphate is high, do a 20% waterchange. Take half of the bio balls and shake them in the old tank water. Siphon up as much of the sludge as you can. In a week do the same thing but clean the other half of bio balls. Try running carbon for a few weeks to polish up the water. Test your water every other day. And after a month you sill have nitrates and phosphates look into adding a phosphate reactor they are Cheep and easy to set up.

Tomchong22 is offline   Reply With Quote
Old 10-26-2011, 09:27 AM   #3
Aquarium Advice Apprentice
Join Date: Oct 2011
Location: New York
Posts: 28

Here are some pics of my tank
Attached Images
Djangom 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

» Photo Contest Winners

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 04:28 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.