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Old 11-01-2005, 07:30 PM   #1
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Green Water

Can anyone tell me what I"m doing wrong?? My water is crystal clear in my 80 gallon tank, but I've got this light green tint in the water that is truly bugging me.

It is heavily planted with 4 discus, 2 angels, 1 shark, 5 columbian tetras, 3 bristlenose plecos and 3 kribs.

I do a weekly gravel cleaning and two, 35% water changes a week.

What's going on?
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Old 11-01-2005, 08:06 PM   #2
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Sounds like a typical algae bloom. Excessive nutrients in the water. If I remember, you are injecting CO2? I would check the phosphate and NO3 levels to see if they are out of whack. 20ppm NO3 and 1.0 ppm PO4 are fine.

In the meantime, small 20% PWC's are in order.
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Old 11-01-2005, 08:20 PM   #3
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I already do two, 35% water changes, sometimes 3 times a week and it doesn't seem to help.

I haven't begun any CO2 injections. All I have for plants right now is root tabs.
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Old 11-01-2005, 08:25 PM   #4
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Understood.

I would still check the NO3 and PO4 levels. How much light and how long?
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Old 11-01-2005, 09:28 PM   #5
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If you are 2.25 wpg or over the CO2 should really help, in conjuction with a good nitrate - phosphate ratio.
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Old 11-01-2005, 10:23 PM   #6
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There may be a problem with balance and there may not be. I thought everything was out of whack with mine and over the past 3 weeks my almost blue water has gone back to almost clear. The only noticeable change is the anacharis taking root finally. I think it might be a transition point when the plants decide to finally establish themselves and the green water takes over until your plants can get back to using up the nutrients. By all means, find out what the levels are and make sure something isn't out of whack but don't stress out if things are normal and you can't control it. It should start to go away once your plants get a little happier and established or reestablished.
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Old 11-02-2005, 09:40 AM   #7
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Here's a list of several methods to solve your green water. Eliminate the green water, then make sure you fix whatever caused the situation, though most often it's a slight spike of ammonia/ammonium that's the culprit.

www.aquariaplants.com/cloudygreenwater.htm
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Old 11-02-2005, 11:18 AM   #8
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I did another water change last night and did a test before bed.

0 ammonia
0 nitrites
and very minimal nitrates.

The green is a very light, light tinge, but enough to bug me.
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Old 11-02-2005, 11:23 AM   #9
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I think you need to test the phosphates. I think that will help sort out what is going on. How many wpg?
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Old 11-02-2005, 04:22 PM   #10
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NO3 ratio to PO4 needs to be about 10 to 1.. if you have very minimal NO3 if you have any PO4 it will be a pain to get your ratio in line.. your going to need to dose some NO3 to fix this situation.. and test for PO4.. HTH
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