Brown Algae Bloom - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
LinkBack Thread Tools
post #11 of 13 Old 08-01-2011, 12:17 PM Thread Starter
Cassandra90's Avatar
I kept the tank filled with half of the old water and added new water to fill it back up. I am not to sure what the sand is. I would have to look it up or look on the bag when I get home. It is black sand, got it from petsmart. I am guessing the mini cycle too. After I changed everything the water did get really cloudy, but then I was gone for 4 days and came back the water is clear but now I have algae every where.

Cassandra90 is offline  
Sponsored Links
post #12 of 13 Old 08-01-2011, 12:40 PM
Byron's Avatar
The substrate change-over caused an imbalance in the tank's nutrients. Much the same as a "new tank." This is frequently the cause of sudden algae, in this case diatoms (brown algae as it is called). The organics in the substrate are essential in a planted tank, and bacteria (with the help of snails) break organics down into nutrients, and the plant roots play a big part in this. Having changed the substrate, all the organics disappeared, so the water biological stability was suddenly gone, hence the diatoms.

The type of algae is another issue, in this case it was diatoms which could just be the above, or it might indicate silica sand. When you have checked the composition of the black sand we'll know. I would not suspect black sand of being silica-based, as silica is whitish (like the sand in sand traps on golf courses) made from silica quartz. But let us know.

Another source of silica is tap water; in some areas it may be higher in silicate, and this contributes to diatoms. As does low light. I still suspect it was the imbalance though. That means it will not last. Remove what you can. So-called "algae-eating" fish like Otos, Farlowella, Bristlenose plecs, etc., will eat this readily. I do not recommend buying fish just for this, but if any of these happen to be in the tank, they will handle it. But once the balance is established again, probably end of the diatoms.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
Byron is offline  
post #13 of 13 Old 08-01-2011, 01:00 PM Thread Starter
Cassandra90's Avatar
I do not have any algae eating fish, and I wouldn't get anyways. I do have some snails that hitch hiked from the plants that I bought I counted about 5 but they are so small.

The sand that I have in there is CaribSea Super Natural, I do not believe it is silica based. Well hopefully after a few scrubs and water changes the algae will go away.

Cassandra90 is offline  

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bacteria/Algae bloom. I'm pulling my hair out!! amatvivere Tropical Fish Diseases 13 06-11-2011 01:37 PM
Algae bloom Teammuir1 Beginner Freshwater Aquarium 16 01-04-2010 01:18 PM
diatom bloom? but green algae? jjtf00 Beginner Saltwater Aquariums 4 12-17-2009 02:14 AM
Red algae bloom bubbles3660 Saltwater Fish Diseases 4 02-27-2007 04:07 PM

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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome