Help with algae ID and solution

[Ferrell]

This algae just cropped up a couple of days ago and is now spreading. What is it, how to cure?
Tank is 75/20
Parameters:
34 ppm salinity
8.0 Alk
420 ca
1500 mg
0 Nitrate
0 phosphate
Nitrate and phosphate been zero for nearly two weeks. Trying to raise with lighter skimming and more dry skimming than wet.
2 clowns, two Blue chromis one lawnmower blenny, 1 goby, snails and blenny take good care of rock work. Two nassarius and one tonga under sand bed. 30 lps frags over last month. Running two MP10 anti sync on reef crest @ 50% and varios4 at 65% and getting good all around water movement. Feed twice a day fish pellets, corals once a week reefroids and dose 1 ml KZ LPS once a day. What is it and how to resolve issue

 

[EmdeReef]

How old is the tank? Can you post a pic without the blues on?

 

[Ferrell]

Tank is 4 months
It’s all but disappeared now this evening. Freaky. Hope this is better. It’s a reddish brown and like GHA, weblike and stringy.

 

[EmdeReef]

Looks like cyano to me.

 

[Ferrell]

Looks like cyano to me.

Better daylight picture. Best I can do with phone. Second one on mono setting Like I said is no there at night. Have water change scheduled for weekend. Should I have a blackout period? Blenny, snails not eating it.

 

[xCry0x]

Tank is 4 months
It’s all but disappeared now this evening. Freaky. Hope this is better. It’s a reddish brown and like GHA, weblike and stringy.

Cyano -- tends to show up when lights come on and go away when lights go out.

You will get all sorts of responses -- Chemi clean knocked it out for me: https://www.amazon.com/Boyd-Enterprises-CC02-Chemi-Clean-2/dp/B00025YRJS

 

[EmdeReef]

Tank is 4 months
It’s all but disappeared now this evening. Freaky. Hope this is better. It’s a reddish brown and like GHA, weblike and stringy.

It happens early and later on due to nitrate and phosphate imbalance.
I’ve only had it once in many years, pure dumb luck.

You should start by physically removing as much while it’s on sand. I did that with a fish net and fortunately didn’t return but it can.

 

[Junior84]

Will switching lighting from LEDs to T5s cause a algae problem? My tank has been great for months i added a small piece of live rock and swtched my lighting and boom i feel like i have 5 different algae in my tank all of a sudden

 

[xCry0x]

If you had bad LEDs before that didn't generate enough PAR.

When I started my tank I had just a normal light bulb over the tank - no algae problems. Once I upgraded to LEDs that could grow corals, algae exploded.

 

[Junior84]

I really do think the lights i had on the tank were just okay they grew my coral but not great then i wanted something proven good growth and switched to the t5s and got the ATI bulbs and boom it all came to a head and exploded but its not the same algae i had before its different

 

[Junior84]

This is what it used to look like before i left for a week then it was all gone and things were doing so great from September till about two weeks ago

 

[Junior84]

From September till about two weeks ago i had this

 

[Ferrell]

It happens early and later on due to nitrate and phosphate imbalance.
I’ve only had it once in many years, pure dumb luck.

You should start by physically removing as much while it’s on sand. I did that with a fish net and fortunately didn’t return but it can.

I tried sucking it out and it was like a sheet of slime. I tried every utensil I could including my tongs but BIG DUH never thought of net. Clouded the tank up pretty good so I’ll give it a whirl when it comes back and the tank clears. Thanks a million