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Questions tagged [algae]

Photosynthetic microorganisms that grow in wet environments. Algae are not plants, but large growths can sometimes resemble them superficially. Pet owners may encounter algae as a cosmetic nuisance, a food source for herbivores, a water quality problem, or even symbiotic growth within an animal (most often corals). This tag will often be used in the context of an aquarium or pond, but not exclusively.

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How to remove the algae from the glass of an aquarium?

I have an aquarium and it has algae on the glass. The algae is somehow so attached to the glass that I´m afraid I'd scratch the glass if I tried to clean it using some hard plastic. How can I remove the algae without damaging the glass?
woliveirajr
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How do I eliminate the black algae from my planted aquarium?

My aquarium has live plants with a betta, hatchet fish, barbs, a cory, and a Siamese algae eater. Black algae is growing on the decorations and glass. I scraped it off the glass. What else should I do to keep it from coming back? My tank is not…
Jeni
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Would a small amount of bottled water mixed in with an aquarium harm the fish?

This is kind of urgent - I'm watching someone's dogs currently because that is what I am experienced in but they also have an aquarium. I have little to know experience with fish and I did warn the owners. I don't have 100% of the information, a lot…
fishnewb
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Which South American fish will keep pygmy chain sword plants clean?

I have a new tank (40 gallon long) that's just finished cycling. I've had plants in there for a few weeks already and they're doing well overall, but are starting to show some real algae build-up. In particular my pygmy chain sword plants…
toxotes
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How do I know if there is too much algae in an outdoor fish pond or pot?

This question Would my fish benefit from snails in their pot pond? asks about having snails in a fish pond/pot to reduce algae. My fish are happily living in a outdoor ceramic pots, approx 80cm high x 50 cm in diameter. They have fish pond mud, sand…
user6796
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Plants for dirty/algae ridden goldfish aquarium

I have a 20 gallon (70 liters) freshwater aquarium with two comets, which are now about 2 inches each. The aquarium gets dirty with algae covering the glass and all the plants very quickly after cleaning. This is nothing like the freshwater tank…
DaveO
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Red algae in my tank

I have found some red algae last night in my tank. I'm looking for possible cause and also a way to kill it. I have shrimp and fish in that tank, so no chemicals if possible. My water parameters are stable since 4 months: ammonia: 0 mg/l nitrite: 0…
Rémi
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Crimson colored growth in saltwater tank?

Today I notices some dark red growth on inside my aquarium. Any idea what this is?
Antarr Byrd
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How to reduce excess micro-algae in pond

I have a small pond (I don't really know the volume, maybe 400 liters) with goldfish inside, they seem healthy with no apparent problem. The pond is constantly invaded by micro-algae that cannot be filtered, the water is constantly green and I can…
Yeeter
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Green water after refilling dry tank with no fish

Several months ago, I moved to new city and had to drain my 20-gallon tank and give away my fish. The tank sat empty (aside from the gravel) for several months. Last week, I decided to fill it back up, add some bacteria (Tetra brand, I think), and…
PowerSystemsDev
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Green water in aquarium

So my 45 gallon tank water has a greenish tinge to it. I assume its algae, as I put it below a window. Even with the blinds closed, Im sure it gets some sunlight causing the algae to grow. I got a green killing machine to try to fix the issue,…
Keltari
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UV film on fish tank

I have moved in to a new condo. The only place for the 40 gal. tank is across the room from the picture window (facing north, no sun). I Am now having a problem with algae that was not present before. The lights are on timer and the feeding schedule…
Bruce Bedford
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Is this white hair algae?

So I have started a small nano planted tank. Super ambitious I know. I failed once and now I am going for it a second time with some new plants and doing waters change almost every day. Currently I have got some white hair like stuff on my plants…
Garrett Sanderson
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How to remove the red algae in reef tank

We have had our reef tank for about a month and a couple of weeks. For the last two weeks we get red algae on our live sand; after we remove them, they reappear after less than two hours. Attached photographs show how does it look like. How do we…
Diana R
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Algae will not go away!!!! And snails, too!

Images, regional, and general info: Image 1: Strands of dark-green algae are attached to the bottom and floating in the air; algae all over the plants. Image 2: Over-rich substrate? When I hold the evacuator on the substrate floor, it sucks up a…
Wolfpack'08
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