algae id

Hey everyone, I've been battling GHA for a bit and got it under control. Then this stuff started popping up. My initial thought was my nutrients swung too far the other way and this has to be Dinos. But my Nerites and Tuxedo Urchin are eating it, so now I'm not sure. It's reddish brown, kind of...

its been therw for weeks and i have no idea what it is. i dont know if its cyano or that like cotton candy algae or something ammonia : 0 nitrite : 0 nitrate : 0

Hello everyone! as you can tell by the title, I'm just another newbie wondering if what im dealing with is the average rock maturation process happenings or if i should be concerned. the New Rocks have been in the tank for about a month thus far (the big purple "arch" frontmost on the left, the...

These guys have been growing from my liverock and don't know what kind of is, any ideas?

Hi all, I've got this growing near my star polyps and it seems to be taking over the nearest bare rocks. It seems to have long very straight runners and oblong rounded 'fronds' here and there. But it's not green. The trochus snail (seen in pic) might be having a go at it, I'm not sure, but if...

Hey all, I have a 25 gallon AIO, been up for over a year, I feel like in my old 75 gallon tank I had this too but what is all this stuff on my rocks? I’m assuming it’s a buildup of some algae, it’s not hair algae but I’ve never known what it is and usually I just up my flow and get more snails...

So I've been having what appears to be a maroon clove like algae that started growing from the cracks of this rock. It's the only area I have it and it does not spread fast but it grows. The crazy thing is that it disappears whenever the lights are off. It retracts whenever I touch it with...

They looks like diatom but they're hairy, swing with the water. This is my new tank and I introduced some corals from my old tank which is heavily infested with GHA, I wonder if they're baby GHA?

Hello. I've been suffering from excessive algae growth on the glass for about 2 months. I'm not talking about normal green film algae that needs scraping every few days, but I'm getting this strange green "dust-like" algae on my glass that starts to come back 5 minutes after wiping! No...

At first I thought this was cyano but think it could be dinos because it recedes to an extent at night? Looks like a slimy film that is covering sand and sometimes the rocks. I believe that some of the brown/green is hair algae and my lawnmower blenny and pincushion urchin seem to have dented it...

Just curious if anyone knows what this macro/algae is? I don't really consider it a nuisance algae but I'm not sure what it is. Each stalk is maybe a cm or two long.

I had bought this macroalga few months back, I always thought it was C. racemosa, but I noticed the difference in its frondes (stalk) that grow shorter than the C. racemosa image I found in the internet that had tall frondes sprouting from the stolons. Is it just individual variation or I had...

Hi fellow members, New to the reefing world and still learning. I have a 20 G tank with good parameters. Tank is under 8 weeks old. I have 3 questions regarding 1) green looking algae in my filter 2) on my coral and now at the base of that corals plug (coral I am not sure what it is; I won...

For the past few weeks I’ve noticed these weird little green algae bowls growing on my rockwork… not sure if these are micro or macro so I apologize if I’m in the wrong spot. I can’t find anything resembling this anywhere but it’s hard to search when you don’t know what you are searching for…...

I have this greens algae, plucks off easy, doesn’t like direct peroxide. Purple urchin slowly eats it. I have GFO running 0.17 nitrate 0.002 nitrites 0.01 phosphates calcium 400 magnesium 1380 alkalinity 8.2 pH 8.1 and salinity 33 ppt I want to get rid of it as it’s outcompeting my coral frags...

Hi everyone! For the last month I’ve been battling with what I believe is Dino’s. They slowly seem to be disappearing and have only ever stayed on my rockwork, wavemakers and back panel of my Fluval flex tank. Ive changed the filter floss every other day which has helped massively and fed more...

Mods please delete this post, wrong forum.

I have had this tank for over a year and a half. I recently changed the aqua scape with Marco rock around two weeks ago. I went on vacation for 5 days and it was white before vacation and now it’s filled with some sort of algae. I had hair algae in the past, so I assume it’s partly this. But...

I thought it was coraline algae at first, but now Im not sure. What is this and how do I get rid of it? Im doing a deep cleaning at the moment, scraping off a lot of algae which is why there's tons of algae flying about in the water. The green algae is only visibly green with white light...

I have some new algae(?) growing on the back wall of the tank. It's pretty hard to get a sample of it, as it feels like a crust, so I tried to scrape some and look under a microscope. Here are some pictures, please let me know if you have any clue on what it could be. I'm hoping it's some type...

Hello everyone, I have been struggling with this algae in my sand bed for close to 3 months now. I haven’t had much other problems with any other algae besides hair algae, but I got most of it gone. I have no idea how to get rid of it. It goes away for 2-3 days and shows up again. I do biweekly...

Hello, I've went fallow on my tank for a couple months due to a velvet outbreak. During this time I started to get some GHA throughout the tank and it slowly turned into this webby reddish algae. I was thinking about getting some fish soon since the velvet is more than eradicated by now, but I...

Hello, I've went fallow on my tank for a couple months due to a velvet outbreak. During this time I started to get some GHA throughout the tank and it slowly turned into this webby reddish algae. I was thinking about getting some fish soon since the velvet is more than eradicated by now, but I...

So ive noticed this algae popping up in my tank over the past few weeks. It is on the sandbed and rocks and I have looked it up and have not been able to identify it. It is almost fuzzy little balls that coat the surface of my sand and rocks. It definitely doesn’t appear to be one of the...

Hello I have this moss like purple algae growing on my life rock. It doesn't come off like the cyanobacteria I have in my other tank, that grows on the sand and other decor. Is this also cyanobacteria or is it something else? Also I think the dark spot is good algae? I've had this tank running...