Brown Algae

poker_nerd

New Member
I have a 72 FOWLR tank. The tank has been up about 2 months. I used cured live rock to cycle it so it was fully cycled in about 2-3 days. Fish are real healthy. Anyway, I was using a single strip fluorescent to light my tank & Only had it on 4-5 hours in the evening when I was home. The owner of a local fish store told me that if I wanted to avoid unnecessary brown algae growth to keep the lighting on @ a minimum because the lighting I was using wasn't powerful enough to stimulate green algae which would be eaten by my inhabitants.
I replaced the cheap light with a Nova Extreme T5, 4 lights & lunar basically because I wanted to see if I could stimulate some coraline growth on my rocks... as i said, the fish have been doing great. I was running the blue lights 10 hours & the white/blue for about 7-8. Anyway, I have had a huge growth of brown algae all of a sudden.
My nitrates are @ .20ppm which I know contribute largely to alagae growth. What do I need to do? Is it my nitrates? My lighting? Should I just cut back the lighting or is this brown bloom the one you always hear about that's associated with newer tanks? If I keep the lighting on will the brown turn to green? I was thinking of adding a 20 gallon elevated refugium with a deep sand bed & plants to help reduce the nitrates. Any help or advice would be good.
PS: I have probably 50-75 lbs. of live rock in tank. I'm not using a sump because my tank wasn't drilled & I didn't want to get into leaky overflow boxes. I'm running (2) Emperor Bio-wheel filters (the biggest ones - 4 wheels total) & I also have a UV sterilizer I'm running.
 

robertmathern

Active Member
sounds like it is a fairly nwe tank with diatom alge. It is common in new tanks and will go away on its own. I call it part of your cycle but the ulgy part of your cycle.
 

poker_nerd

New Member
If that's the case, should I just keep the lighting periods on same schedule? Once this diatom get's resolved, does it sound like my algae growth would be normal with that type of lighting & nitrates? Thanks.
 

robertmathern

Active Member
well I dont know how much alge you got but yes diatoms should go away and the lights you got will be fine for coraline alge and some corals. The bio wheel filter I do not recomend but is fine. However it can and most likely will cause nitrates down the road. I would go sump but thats just my opinion. U tube overflow boxes have done well for me there are good brands like eshopps that do the job really well
 
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