green hair algae

shurik

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hey i have a 75 gal tank and 25 gal sump and a i have a green hair algae i have used many staff and is not helping at all i do water change 15% weekly i have been using a nopox 10 ml per day but my no3 still high i test my water with a salifert test kit and no3 showing about 50 ppm and po4 is near 0 i need help i feed less and my light 4 to 6 hours per day i dont know what should i do
 

RobZilla04

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Welcome to R2R!

Questions to start with.

How old is the system?
Started with Dry or Cured Live Rock?
How stocked is the tank and what is it stocked with (fish/coral)?
Are you currently manually removing as much as you can of the GHA by hand?

Po4 cannot be 0. You're getting a false reading because the GHA is soaking it all up as soon as it is available and before the test kit can register the real level.
 
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shurik

shurik

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my tank is years old i start with dry rock i have about a 17 fish and some soft corals yes i am removing by hand and is still coming back my po4 is 0.03 i just test it
 
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shurik

shurik

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yes i have a refugium and i have a skimmer and water change weekly 15 % i have a lots of snail no ones getting the GHA
 

Wolf89

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Hermit crabs eat hair algae
 
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shurik

shurik

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i am using nopox 15 ml/day
nope none of the hermit crabs eats GHA
 
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shurik

shurik

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here is some pics

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RobZilla04

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Cut the light schedule and intensity dramatically. Cut feeding to once a day (only as much food as the fish can completely consume in two minutes). Remove as much as you can by hand, followed by a large WC. Run GFO (preferably in a reactor) and change every few days.

Repeat the manual removal and water changed until you can get it under control.

Don't trust the Po4 test results until the GHA infestation stops growing.
 
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shurik

shurik

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i am running GFO and my lights is on only for 4 hours /day i feed one times a day only little bit that all but my NO3 is very high i had a 100 ppm i start using a nopox after a week got down to 50 then next week to 25 now it is a 3rd week i am using a 15 mil /day
 

RobZilla04

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There is no magic elixir or spell that can cure the GHA. Determination and persistence eventually pay off.

Good luck.
 

Oshengems

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Give vibrant a try but do some research first few people had bad experiences most good they have an official post for it
 

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