Algae problems, Cyano or Diatoms?

[Humpty]

Ok so I have a reef system that I started around the middle of October 2014. So its been up and running for about 4 months. It is a 180g tank with an 80g sump. I run 2 x 5' ledzeal led lights. I have a skimmer rated for 400g and I use ro/di water. I have it stocked right now with various corals and,
2x black ice clowns
4x regular clowns
6x blue chromis
1x lawnmower blenny
1x 6 line wrasse
1x velvet damsel
1x royal dottyback
15-20 hermit crabs
3x turbo snails
I feed them homemade frozen food once a day.

I have been into freshwater tanks for about 10 yrs, I have kept tanks from 10g to 200g. I have an understanding of most of the algae that I have to deal with. Saltwater is a whole different beast. Im having a harder time figuring out what is what.
So lately I have been getting some red spots in my sump and on some rocks and also on my glass. I know from freshwater that cyano usuaully develops in sheets and comes off easy. Well these red spots don't develop anything like it does in my freshwater tanks. its just a bunch of spots not sheets. I also read that turbo snails will not eat cyano but whatever is growing all over my glass my turbo snails eat it up. Some of the red spots are on the glass pretty good, doesn't come off with my fingers. Some of it feels a tiny bit slimy, but not like cyano, more like diatoms. I've also read that cyano develops in lower flow areas but I am getting red areas in my higher flow areas and nothing in the slower areas. I heard that if you use a turkey baster cyano should come off the rocks but nothing is coming off when I do that.


I test my tank every weekend. This sunday my parameters were as follows:
Ph = 8.3
Alk = 13
Nitrate = 10
Phospahte = 0.5
Calcium = 460
Mag = 1350
Salinity = 0.026
Temp = 79

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So can anyone help me figure out what type of algae this is so I can figure out the best route to getting rid of it?

[Slyguy00]

Looks like Cyano to me.

[Craigdillman]

Cyano too me too increase flow and manually remove it will doscourge growth it should go on it's own in time there are some products out there that fix it I've used a few and both worked good just follow the directions but if it's a small case flow and wc and time should solve it

[Skimmin]

Dosing vinegar with a big skimmer for export and a uv light has worked awesome for me. My tank is 300gal, and was started November 2014. I had the same issues you describe and also had a fair bit of hair algae and a really cloudy bacterial bloom too. It was so bad at one point I could suck out the cyano and within about 10 minutes it would be back. I have been dosing 30ml vinegar daily since I started the tank and in the last few weeks the that has become completely clear of algae. Reefwars posted a vinegar dosing regimen. I have been sticking to .1 ml per gallon vinegar and am now slowly increasing the vinegar to 40ml per day. Nitrate and phosphate are 0.

[Simmy]

I've used Chemi-clean in the past and the Cyano hasn't come back! Its a good product to use but it'll make your skimmer go nuts for about a week.

[BubblesUp]

I used Chemi-clean like Simmy and it works very well. I got mine on Amazon.

[reef-keeper]

Did you record you phosphates correctly? .5 is real high. Should be < .04. That high level will cause algae growth

[GoFish]

Does anyone else think that really coarse substrate like that could cause issues by trapping detritus and pockets of stagnant water? I would think the water quality at the bottom of the tank could contribute to algae.
Just a thought

[reefwars]

Originally Posted by Vancity

Does anyone else think that really coarse substrate like that could cause issues by trapping detritus and pockets of stagnant water? I would think the water quality at the bottom of the tank could contribute to algae.
Just a thought

yes absolutely , while ditrius its self is near the end of the line , trapped foods def will break down into nitrogen and phosphorus which can fuel cyano for sure

i personally wouldn't have such a large grain sand bed either