Brown algae bloom help! Check out PICS & VIDEO!

Hello all 1st ill give you the break down of the equipment then ill let you know whats up.​

112 gallon acrylic (reef to be) saltwater tank, Euro Reef Skimmer in sump, 4 Hydor Koralia pumps, 30 Gallon sump w/ sock filter, 100 lbs of Fiji Live rock, 50 lbs of base rock, 5 blue/green chromis, 3" 50/50 live sand bed
Current levels read, Nitrate-40, Nitrite-0, Alkalinity-300, PH-7.8, Ammonia-0, SG-1.022, Temp 76.1, Lighting Sunpaq 2-65 watt Dual Daylight 6,700k/10,000k and 2-65 watt Dual Actinic 420nm/460nm, and 48" 24 LED Moonlight --Daylights on 7:30 am - 7:30 pm Nightlights on in-between,
75 Gallon RO/DI unit​

My tank finished its cycle about 10 days ago and that’s when I added 5 blue/green chromis. 5 days later I was looking at the fish before I went to work and one of the chromis looked like it had ich. Standard white spots all over. When I came home, that fish was missing. I looked everywhere for that fish but it is MIA. Now all other fish seem to be doing fine, however one has a damaged side fin but is still doing good. Now 5 days after that I have a bloom of brown algae all over some of the live rock and substrate. ​

What is this from the lights, from my missing fish or just the normal course for a new tank? ​

Can I avoid the brown algae?​

How do I find the missing fish?​

Should my skimmer be on right now?​

YouTube Link- http://youtube.com/watch?v=gusRzKs9Mmg

Thank you, Game24_7​

 

Hello,
The brown algae could be a result of any number of variables. Yes, it could be due to your lights, as well as it being a new tank set-up! There is really no way of avoiding this scenario, just ways of limiting its growth and duration.
Efficient skimming and good water flow, and frequent water changes along with limiting excess nutrients in your water(avoid overfeeding) for example.
Eventually, it should subside and disappear-but don't be surprised if you get other forms of algae as well next or from time to time!

 

Agree with coral reefer...brown algae bloom normal in early stages of tank life cycle...

Just keep those water params in tolerance and it will go away...

;D

 

You don't have any corals, there's no need for that much lighting on for that long (assuming the room the tank is in has a window and the tank will get ambient lighting).

You don't, bacteria have already reduced it to nothing by now.

Your skimmer should be on