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Old 04-30-2008, 10:59 AM
 
Location: Kent County, DE
699 posts, read 2,895,925 times
Reputation: 454

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We are fairly new at this so please have patience. We have a new 75 gallon aquarium with several tropical fish. It was a Christmas gift. Recently, we have noticed DARK green spots on the foliage (silk) and on some of the pebbles in the bottom. It does not look like algae as it is a kelly green.
Can anyone give us guidance on what this is and how to treat it. Any help will be appreciated.

Last edited by from PA; 04-30-2008 at 11:13 AM..
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Old 05-02-2008, 02:56 AM
 
Location: The Great State of Arkansas
5,981 posts, read 18,274,662 times
Reputation: 7740
I think you're seeing blue algae, and it is a HEADACHE - it's actually a bacteria.

Blue Algae , cyanobacteria

It's from too many nitrates and/or phosphates in the water. You'll have to do some major adjustments and it is so hard to get rid of....I just threw out a bunch of plants because they were covered in it and changed out gravel.

One thing - if your aquarium is getting too much light it just grows by leaps and bounds. Make sure you aren't getting too much direct or indirect sunlight in there, and get a different type bulb for your aquarium. The fluorescent ones that come standard with a new aquarium are too bright - there's one that blocks UV rays or something. I don't understand all I know, but when I had a big aquarium I had a lot of success when I changed to a different light based on what the fish man at the aquarium store told me. I think a lot depends on what types of fish and plants you have. Also, overfeeding and a filtration system that isn't up to par will make this difficult to get rid of.

I'd seek out someone really knowledgable, more so than the Petsmart people. And good luck - it makes your aquarium STINK on top of everything else.
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Old 05-05-2008, 08:20 PM
 
Location: Independence, MO
543 posts, read 2,310,905 times
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Sounds like an algae spore. We only leave the aquarium lights on about 8 hours a day, and not near a place where it can get too much sunlight. Is it near a heat vent or is your temperature of the water too high?
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Old 05-13-2008, 11:34 AM
 
Location: Kent County, DE
699 posts, read 2,895,925 times
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Thanks for the info. we are going to try the Corydora sterbai first. Hope that solves our problem. Our tank is not currently in direct sunlight and we have a fillter with a special light that keeps the tank clear.
There does not appear to be any smell associated with this condition. Just hope this remedies our problem. Our fish appear to be otherwise healthy.
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Old 05-15-2008, 03:33 PM
 
Location: McKinleyville, California
6,414 posts, read 10,495,242 times
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I used to have tropical fish in a 30 gallon tank. First of all, I changed the water by 1/3 of fresh water that had sat for 24 hours about once every month, I also did a total tank clean once or twice a year as needed; remove fish to a holding tank, remove gravel and boil it. remove plants and wash in hot soapy water if they are fake. I preferred live plants. Scrub the entire inside of the tank with soapy water and rinse well. Fill the tank with fresh water , the cleaned gravel and plants and turn on for 24 hours before returning the fish. Also get a few good aquarium snails to help keep down the algae.

All this aquarium talk makes me want to have one again.
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Old 05-15-2008, 06:55 PM
 
Location: Kent County, DE
699 posts, read 2,895,925 times
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Our tank is 75 gallons so it won't be easy but if it works we'll give it a try.
It has been set up now for 4 months. Also, My dh says snails multiply like crazy.He had them years ago and said they were out of control. We were going to try the corydora sterbai . Will any bottom feeders do the same thing?
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