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Old 11-20-2017, 08:46 PM   #1
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need help fixing my tank

I have a 90 gal tank it has been up for a year i do water changes every two weeks i use instant ocean reef crystals in the last month or so i started to have reddish sponge growth on the live rock and in the last week i have had a green algae starting on the glass
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Old 11-20-2017, 08:47 PM   #2
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I have a 90 gal tank it has been up for a year i do water changes every two weeks i use instant ocean reef crystals in the last month or so i started to have reddish sponge growth on the live rock and in the last week i have had a green algae starting on the glass


Do you use tap water? Pictures please
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Old 11-20-2017, 08:48 PM   #3
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i use ro water
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Old 11-20-2017, 08:49 PM   #4
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i use ro water


Okay do you have any nutrient levels you can give to us
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Old 11-20-2017, 09:04 PM   #5
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Okay do you have any nutrient levels you can give to us
Salt level = 1.025
water temp = 80.8
ph = 8.4
Ammonia=0 ppm
nitrates=40ppm
nitrite=0 ppm
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Old 11-20-2017, 09:06 PM   #6
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i am running a protein skimmer as well
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Old 11-20-2017, 09:51 PM   #7
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nitrates=40ppm
phosphates are probably just as high what is your stock and feeding schedule and what do you feed .
large water changes and more circulation in the tank should help

reef 0ppm to 20ppm try to keep it as close to 0ppm as possible

fowler 20ppm to 40ppm try to keep it closer to 20ppm or even lower if you can
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Old 11-20-2017, 09:58 PM   #8
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phosphates are probably just as high what is your stock and feeding schedule and what do you feed .
large water changes and more circulation in the tank should help

reef 0ppm to 20ppm try to keep it as close to 0ppm as possible

fowler 20ppm to 40ppm try to keep it closer to 20ppm or even lower if you can
i have three yellow tail damsel one coral beauty angel one royal gramma about 7 hermits and one snail i have two power heads one is on all the time the one is on for 15 mins then off for 15 mins i feed about 2 time a week i feed omega one marine flakes with garlic
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Old 11-21-2017, 01:21 PM   #9
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The nutrients are just building up in the system, which is causing the algae growth.
I would suggest keeping all your powerheads on all the time to help with low flow and getting as much uneaten food and poop in the water column until it can be filtered out rather than giving it the chance to settle and decompose.
I would also move to weekly water changes around 10%. To get ahead of the issue, youíll need to do large water changes on top of that as well. A 50% water change would bring your nitrates down to 20 and in a much better ball park. Siphon our as much gunk as you can during the water changes as well.
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