algae identification

Went away for a week and came home to this completely taking over my sump. Protein skimmer working very hard. Used up half my reef mat in 3 days. It feels very slimy and comes apart quite easily. The consistency almost feels like slime around a piece of string, but the second you touch it, it...

For about two weeks now I've been struggling with what I believe to be some kind of green hair algae. It's not terribly long and is very difficult to remove manually. My turbo snail has been eating some, but it just grows right back. My tank has been running for 2 months. My nitrates are sitting...

For about two weeks now I've been struggling with what I believe to be some kind of green hair algae. It's not terribly long and is very difficult to remove manually. My turbo snail has been eating some, but it just grows right back. My tank has been running for 2 months. I tried using a...

I have an algae appear that I need help w ID. It grows in a stringy reddish brown growth pattern. Also it may or may not have air bubbles within the algae . It may be clinging to it from my HOB SKIMMER. My tank is 2 years old. Thx

What’s up everybody, just have a quick question. I am battling some sort of algae on my sand bed and have been for a couple of weeks now. They are like thousands of little individual balls of green algae, and I can’t find anywhere on what they might be. There is a ton of them and I do not know...

Is this a sort of algae or anything else? It is taking over my whole tank.

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...

Hello! We have some hairy brown algae coming and going (snail and shrimp cuc) in the ugly phase about 2.5 months old 65-gallon dry rock bare bottom tank, (BioSpira, copepods, adding eco pods soon, showing a few tiny early signs of coralline from seeding). To the best of my recollection, these...

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...

This has been growing in my tank lately and need to know what it is so I can get rid of it

Hey all, I'm new with reefing and this is my first algae bloom that wasn't diatoms. At first I thought it was just a heavy case of them but they seam more maroon than rusty color like I've been use to seeing and they have these little strings forming and trapping little o2 bubbles up in the slab...

Hi all, Recently I changed skimmers and my chaeto died off, and now is back with a different texture (weird right - it’s much thicker, darker green, and stiffer than earlier) and what seems to be a new species or algae has started growing on the water surface. Any idea what this is stuff is...

I hate to be that "What's this?" guy but I wanted to confirm what I'm looking at here. Based on descriptions and images on the web, I believe it to be diatoms but wanted someone else’s opinion. My concern is that my NO3 and PO4 have both read 0 for months now so I concerned that it’s dinos...

Hi only been reefing 3 months, can anyone give me information on the following images….. Thank-you in advance….. One image I have some green colour on sand the next looks a bit like a skin of deep purple….. If you zoom in on center of the next image you can see something like a dandelion seed...

What is this that is taking over my tank!? These are the best pictures I could get with my son’s microscope. But I figure someone out there might be able to I.D. what it is…. At first I thought dinos or diatoms because they came back worse when I cleaned them and did water changes. After...