Grey/black algae
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Old 05-06-2012, 11:28 PM   #1
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Grey/black algae

I have a problem with an algae explosion tht has killed my fish, 5 rummy nose tetras and a bulldog pleco.

It's grown on two planted bogwoods tht were recently added to the tank. I added them last thurs, 3-5-12, everything was fine the fish enjoyed swimming thru the leaves etc...

On friday i noticed some slight algae growth on the plants but hardly worth worrying about, I did my usual water change on sat and by sun morning all fish had died the algae had grown like ten fold and the water is slight cloudy

My water was fine before I did change everything at 0 ph was stable at bout 7, the tank has bin up and running since jan and is fully cycled. I'm guessing I did something I'm no expert at fish keeping just not what I did differently. Only new thing was the planted bogwoods

Any help to get rid of the algae and prevent it from coming back would be greatly appreciated

I have a 55L tank
Temp hovers at about 24-25C
Ph stable at about 7
Lights usually on for bout 8-10hrs
Not sure way else to put like I said not an expert

I'm writing this on my phone will and it wouldn't let me upload pictures do will do next time I'm on comp
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Old 05-06-2012, 11:58 PM   #2
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My guess is that something was in the water that did not get neutralized. Perhaps high ammonia? Whatever it was, it killed the fish. That plus the dead fish breaking down into ammonia caused the algae acceleration. what do you use to treat the water before you put it in the tank? I assume the "planted bogwoods" came from another aquarium?
29 gallon, Fluval 306. Aquatop PF25-UV Power Filter, 1x39 watt T5HO 7" above tank. P.F. Sand, Pressurized CO2, 5 Glowlight Tetra's, 3 Halequin Rasborah's, 3 neons, 2 Oto's, 5 Cherry Shrimp, 4 Amano Shrimp.
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Old 05-08-2012, 04:17 PM   #3
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Yea, sounds like something was in the water. Even disrupting an anaerobic spot in the substrate can nuke a tank or cause algae. I doubt it was anything to do with the bogwood or algae that killed them.

What kind of algae was it?
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Old 05-10-2012, 06:06 AM   #4
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Yeh think I must have hit a ammonia pocket or sumat like tht cos wen I took the fish dead fish they was a funky smell.

The algae is a very dark brown/black now parts of have gone since I used an interpret hair algae removal product
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algae, beard algae, brown algae, grey, red

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