Brown algea

[Justin_NY]

I am having problem with brown algea problem in the tank. My ph is 8, phosphate is 0.4, nitrate is between 20- 30 alk is 6
I use rodi unit,my light running only 8 hrs.
I know im having nitrate problem, but how you solve this.
I do water change 5 gallon every week. I put frozen food, my skimmer is oversize aquac ev240 (my tank only 90 gallon), get new filter sock, i have 2 ecotech mp40 for circulation. My tank only have 10 small fishes ( yellow tang, hippo, 2 clwn, 3 chromis, and 3 barlett) and i still have nitarte problem.
Im trying to install cal reactor but now im affraid the algea gonna take over the tank cause the co2.
Pls help me thx

 

[Justin_NY]

On the rock

 

[cody0709]

That's diatom, part of cycling process, it will disappear in a couple of weeks!
Get some turbo snails, blue leg hermits, lawn mower blenny, and a goby.
Do 20% water changes 2 times a week for the next couple of weeks.

 

[cody0709]

If you can move the corals to another tank it would be a good idea!

 

[cody0709]

Also get some carbon and phosban(2 days only)

 

[petraio]

how big is your tank that you make only 5 gallon of water change and does you RO membrane still good? more frequent water changes are needed !! try not to use salt for reef use for the time being !! as they have more minerals and metals sometimes that can make it harder to solve this issue ! good luck

 

[cody0709]

Tank he said was a 90! Honestly you should be changing a min of 10 gal weekly.

 

[Justin_NY]

Ro unit is new. The tank is only 90 gallon

 

[Justin_NY]

I thought if u do it slow its beetter

 

[LongIslandAndy]

Hi Justin
That is some nasty looking algae, the bubbles look like dinoflagellates. Check out this link. We tested everything but your PH

http://www.reefkeeping.com/issues/2006-11/rhf/#1

Andy

 

[cody0709]

https://www.google.com/search?q=dia...hl=en&client=safari#biv=i|3;d|KlXZ5nKG9nl2TM:

Check this link, it is def diatom algae bloom!!!

 

[jackson6745]

Justin, 10 fish is on the high end of stocking, especially for a tank as new as yours. As Cody said, I would be doing 10 gallons weekly. Your filtration/husbandry is failing you. Time to step it up, or lower bioload. .4 is extremely high po4 you should get some GFO running right away.

 

[Justin_NY]

I been running gfo in the system. The phosphate is .o4
What other filteration u have in u mind rich?

 

[basiab]

I would agree- 10 gallon changes each week. The nitrates are not that bad.
How long since tank was cycled? 10 fish in that size tank is ok but it depends on how mature tank is and on how much time you give it as you add the fish.

 

[jackson6745]

I been running gfo in the system. The phosphate is .o4
What other filteration u have in u mind rich?

Oh, .04 is not bad . I think if you increase water changes a little you will be fine:dog2:

 

[Justin_NY]

The tank been running almost 3 mnths now. I do 10 gallon water change clean all the skimmer. Let see whats going on

 

[Jan]

Does the algae look like slimey, like mucous? Does it appear to be dripping down the back wall? What I'm seeing in the picture does not look like diatom algae to me. It may be dinoflagella.

On a 90 gallon with algae issues I'd aim for at least 10% water changes a couple of times a week or 20% once a week, increase flow in dead spots and reduce light cycle.

Consider cutting back on feedings if you feed a lot. If when you feed there's food still floating around after 3-5 mins, you're feeding too much. Feed small portions (enough that will be eaten in 3-5mins) and feed more often, 2-3 times a day.