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Old 01-03-2009, 09:48 PM   #1
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algae issues

Hello,

I have had a chronic algae issue and have tried just about everything I can think. So, any help is greatly appreciated.

SETUP
Tank:40 gallon "breeder tank" reef aquarium established for approx 1 yr.
Lights: 96X2 watt power compact
Water Movement: 75 gallon sump pump, Koralia nano powerhead, Koralia 600 GPH powerhead, protein skimmer
Salt: Kent Marine with 1.025 salinity
Substrate: 40 lbs sand, 40+ lbs live rock
Fish: Clown, sand sifting goby, angel fish
live stock: coral banded shrimp, 2 peppermint shrimp, 1 male 1 female emerald crab, approx 20 snails, approx 20 hermits
Coral: mushrooms, open brain, yellow polyps, bubble, colt, Green Frogspawn, torch coral, flower

PROBLEM
Chronic (6 months) algae growth
Appearance: brown/rusty algae growth on sand and glass. Growth will get quite heavy on sand.
pH: seems too low

WATER
Home RO/DI, 79 degrees, tested with Quick Dip strips (0 nitrate/nitrite, alkalinity approx 180, pH 7.5-7.8 despite treatment with Kent Marine Superbuffer)

I HAVE TRIED
replacing bulbs, increasing water changes (every 2 wks), red slime remover, tank clarifier, adding the powerheads, adding to the deep sand bed, adding superbuffer

Any Ideas?
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Old 01-03-2009, 09:54 PM   #2
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Almost sounds like cyano. Read our site article.

http://www.aquariumadvice.com/articl...ae-/Page1.html
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Old 01-03-2009, 10:11 PM   #3
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How much are you feeding a day? Are you checking your Phosphate levels?
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Old 01-03-2009, 11:20 PM   #4
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Food and phosphates

I feed:
Pemysis 2x per week
Phytoplankton 3x per week
Cyclop-eeze 2x per week

Phosphates:
I honestly dont monitor, do you have any suggestion for brand/type?
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Old 01-04-2009, 12:32 AM   #5
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I wold try to monitor your Phosphates or get a Phosphate reactor. That can eliminate your Algae issue or less lighting per day 7-6 hrs a day should work. If you have High Phos any algae bacteria will eat it up and cause you to have all sorts of algae. Try getting a Phosphate test any brand should do or Salifert brands are more accurate.
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Old 01-04-2009, 12:43 AM   #6
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First, purchase another test kit since strips are not considered accurate by any means. You also don't need to dose phytoplankton that often considering the invertebrate stock. We'll know more when you have more precise readings such as NO3, pH, Alk, Ca, and PO4.
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Old 01-04-2009, 03:23 AM   #7
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Thanks

Thank you everyone, I will test and post the results. How often should I feed with phytoplankton? Besides that, is the feeding right?
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Old 01-04-2009, 11:21 AM   #8
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I agree...PO4 testing is a good place to start. Test both your tank and RO/DI water. Discontinue the phyto use as you do not have any animals listed that would really benefit from it. Phyto is notorious for increasing NO3 and PO4.
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Old 01-04-2009, 07:54 PM   #9
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Test Results

I purchased an API Reef Test Kit with the following results:

Phosphate: 0-0.25 (really hard to match the color on the chart, but did seem in between 0 and 0.25)
pH: 7.8
Ca: 390
kH: 10 degrees/179
Ammonia, Nitrite, Nitrate: 0

So, not sure where this leaves me....

Ideas anyone??
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Old 01-04-2009, 08:13 PM   #10
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test results part 2

Ok, now I am really confused. I just checked the phosphate level in my tank vs my RO/DI water for comparison. My tank read 0 and my RO/DI read 0.25, how can this be, what does it mean?
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