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Old 10-17-2012, 07:04 PM   #1
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Green water

Hi,

I have a recurring issue with green water. It comes back about 2-3 times in a year. The last time I was given interpets green away, this made the water clear and all was well for a while. It has since returned and I can't get rid. I've tried a few doses of this but the fish seem unhappy with this. It clears the tank for about 2 days then it returns. It's not an issue with lighting as I don't do anything different and have my lights on a timer. Can anyone help with this as I think this chemical is poisioning my fish. I'm thinking of a uv sterilizer but not sure what watt I would need or the best type. My tank is 180L. Thanks x Jackie
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Old 10-18-2012, 02:18 AM   #2
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You either have too much light or dont do enough water change during routine maintenance.
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Old 10-18-2012, 03:50 AM   #3
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A UV will clear water borne algae ok, I use a Vecton 300 on my 190L. The most important thin is not to exceed the suggested flow rate; think its around 960lph on the Vecton 300.

You don't mention any water tests or you water changing regime? I think you need to look at your nitrates/phosphates and if they are high you may need to regularly change as much as 50% I bring it down!
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Old 10-21-2012, 03:41 PM   #4
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Do you have live plants? If not, leave the lights off unless you plan on viewing the tank or are having people over. The fish usually don't mind a darker tank. Ambient lighting suits most fish fine.

After a while with not much light, the algae will die back.

But first, do more water changes to reduce the nutrients the algae is using, like the others before me said.
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Old 10-21-2012, 04:05 PM   #5
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Hi guys, thanks for the replies. The tank was clear the thee day after I used the chemical, but started to green up again. I don't have a test for phosphates but I'm guessing it would be sky high. I am not going to put anymore chemicals int the tank, I'll try blacking it out for a couple of days and see if that works. I trimmed my plants back quite a bit about a few weeks ago, could this be the reason for the sudden phosphate hike because I have less plants to soak it up?..
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Old 11-14-2012, 03:34 PM   #6
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Hi,

I decided to buy a uv sterilizer and so far I'm delighted with the results so far!!!! It's only been 3 days and my tank has gone from pea soup to almost clear. Thought I'd share my pictures. Wish I'd bought one sooner!



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Day 1 v day 3
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Old 11-15-2012, 01:24 PM   #7
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Do the UV Sterilizer lower your nitrates in your tank?
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Old 11-15-2012, 01:43 PM   #8
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Quote:
Originally Posted by BIGBLOC454
Do the UV Sterilizer lower your nitrates in your tank?
Hi,

I'm not sure about that, I don't think so. It irradiacates algae and can control other parasites. After a water change and 4 days of the sterilizer it's almost clear. Here's another picture taken today.

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Day 4
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Old 11-15-2012, 02:09 PM   #9
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It will eradicate waterborne algae and waterborne pathogens, but won't affect many other algae/pathogens, and won't affect nitrates. If anything, it will increase your nitrate levels as a result of killing the free-floating algae (short term only).
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Old 11-15-2012, 02:23 PM   #10
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My nitrates are in the danger zone on my 55gal gonna do a major water change to bring them down would that be a good thing to do
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