algae id

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...

Over the last few weeks, I have seen a new algae outbreak and I’ve been unable to properly ID it. It seems to be encrusting and does not come off with a tooth brush. My CuC doesn’t eat it. My LFS suggested a pinchushion urchin, but I’m wondering if there’s an alternative. I don’t want the...

Hello, just got back from a weeks vacation and came back to this. I have no idea what the dark spots on the sand bed are. Also, the slime-looking algae on the rocks. This tanks is coming up on 3 months old and I have done water changes biweekly now since the tank was cycled. Is this just a bad...

Please help identify. I manually remove and it comes back in a week. Alk 8.5, calc 480, mg 1380, PO4 .05, nitrates 10.2, salinity 1.026, Tmp 78. 5 gallon daily auto water changes. Also have turned off the lights for a period of 3 days a few times.

Hi all, hopefully you can help me!! I have a 24 gallon AIO waterbox peninsula, roughly 8 months old. I have been battling algae for the last 4-5 months. I believe its a combination of diatom, dinos and maybe cyano? the algae doesn’t completely disappear at night, but does reduce slightly. If...

Hello all just wondering what kind of algae this is and if it’s bad. I have an AIO and it’s only in the back compartment where it’s dark.

Hello everyone If anyone would be kind to help us in our new tank. We have had it for 2 months now and just last week this showed up. We can't get our hand on what it is exactly. We have caribsea Life Rock and life sand Ammonia - 0 Nitrite - 0 Nitrate - 20ppm Lights are on for 6 hours We do...

I apologize about the bad quality photos but this is as good as I could get with where it’s located sadly but can anyone tell me what this is? I saw it starting to grow about 2 weeks ago and I’m new to the hobby so I’m not entirely sure if it’s aiptaisa or if it’s another coral growing on that...

I'm not sure what this algae is, it grows like crazy and very fast. I thought it was cyno so I bought some chemiclean and put that in the water and followed the instructions on the box. it looked great afterwards, nice white sand, but its back but it doesn't look like it used to. it looked...

I'm not sure what this algae is, it grows like crazy and very fast. I thought it was cyno so I bought some chemiclean and put that in the water and followed the instructions on the box. it looked great afterwards, nice white sand, but its back but it doesn't look like it used to. it looked...

I'm not sure what this algae is, it grows like crazy and very fast. I thought it was cyno so I bought some chemiclean and put that in the water and followed the instructions on the box. it looked great afterwards, nice white sand, but its back but it doesn't look like it used to. it looked...

So I got excited because this started out with kinda a deep redial purple. I got excited and people told me on a different site it was the start of the coralline algae. Well found out the pros are here… so could you help me out? It’s stringy and now there are bubbles forming in the algae...