murky green water - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 9 Old 03-08-2019, 02:30 PM Thread Starter
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murky green water

I have a tall tank with four angel fish. The fish seem to be doing well, but the water is green and kind of murky. My tank has an automatic heater (I can't change the temperature) and it keeps the water at recommended temp. I do a one quarter water change every two weeks. Any ideas to make it prettier?
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post #2 of 9 Old 03-08-2019, 02:44 PM
With out pictures it is hard to tell.

How old is the tank? and How long is you light period?
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post #3 of 9 Old 03-08-2019, 05:24 PM
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Suspended micro algae or cyano.


Try killing your lights to see if it clears up. A hint would also be if it's clearer in the morning than night.


After it clears up then try 1/2 duration lighting. If it clouds up again cut the duration in half. If it stays clear increase the duration. Until you find the duration where the tank thrives and stays clear.


There are filters like the diatom xl that will clear the water rapidly. But you might have to do that every week or so.


But the best method is to add some plants to consume the nutrients feeding the algae/cyano. I have had angelfish with plants and it worked nicely.


Just me and my .02

maintain Fw and marine system with a strong emphasis on balanced, stabilized system that as much as possible are self substaning.

have maintained FW systems for up to 9 years with descendants from original fish and marine aquariums for up to 8 years.

With no water changes, untreated tap water, inexpensive lighting by first starting the tank with live plants (FW) or macro algae( marine)

see: https://www.tropicalfishkeeping.com/a...-build-295530/
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post #4 of 9 Old 03-09-2019, 08:47 AM Thread Starter
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Quote:
Originally Posted by ben199131837575 View Post
With out pictures it is hard to tell.

How old is the tank? and How long is you light period?

About 2 mos. The light is on most of the daytime, off at night.
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post #5 of 9 Old 03-09-2019, 08:50 AM Thread Starter
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Quote:
Originally Posted by beaslbob View Post
Suspended micro algae or cyano.


Try killing your lights to see if it clears up. A hint would also be if it's clearer in the morning than night.


After it clears up then try 1/2 duration lighting. If it clouds up again cut the duration in half. If it stays clear increase the duration. Until you find the duration where the tank thrives and stays clear.


There are filters like the diatom xl that will clear the water rapidly. But you might have to do that every week or so.


But the best method is to add some plants to consume the nutrients feeding the algae/cyano. I have had angelfish with plants and it worked nicely.


Just me and my .02

Thanks. Will try these. The fish probably like it, but it doesn't look very nice.
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post #6 of 9 Old 03-11-2019, 11:03 AM Thread Starter
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Another thought...this tank doesn't have a strong current. I heard that angels like a low current. The water is quite still on surface, which I notice most when feeding. Would a stronger current matter with the algae?
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post #7 of 9 Old 03-11-2019, 12:20 PM
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Current makes a difference. I have one take that is set up in a moderate-low circular (top down to the bottom) flow with angels. Plants don't move too much, but you can really see it with food particles. Sand top is always clean and never had algae. My other algae-free tank has several bubble walls and a small HOB (sponge is main filter). I'd totally black out tank and get some flow in it (angels wouldn't enjoy a powerhead, but still water isn't ideal either).
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post #8 of 9 Old 03-13-2019, 10:45 AM Thread Starter
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Thanks, I already blacked out the tank for two days, but will try more and lower water level for more current. At this time, the water isn't moving at all and the food just sits there! Thanks again.
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post #9 of 9 Old 03-14-2019, 06:11 PM
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I second adding live plants, it’s the only real low maintence, long term solution to algae control. Plants out compete algae for nutrients all day. I keep all my tanks heavily planted with a few snails and never see algae. You could maybe start with some floating plants like water lettuce, and things like amazon swords, java fern, and crypts don’t really require fancy substrates. Plus live plants always look better than fake.

Whatever you do, avoid flocculants. Easily damages little fishy gills.
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