green algae

Long established tank, this one rock has development this green algae and the other some kind of black (algae? Sponge?) what are they and how can I get rid of them? Root cause?

Hello, all I have had quite the GHA algae that just keeps coming back I am waiting on more test strips to get a better idea of why it keeps growing so bad. In the meantime what does everyone recommend for LONGGGG GHA like 3-4INCH I have big Mexican Turbos, Smaller turbos and the algae on the...

Hello, I started this Fluval 13.5 42 days ago. First added invertebrates after completing my cycle 22 days ago and fish 19 days ago (2 clown fish). I now have 2 clown fish, 1 watchman goby, 1 fire shrimp, 2 nassarius snails, 6 hermit crabs (mix of red, blue, zebra), 5 trochus snails, 5 bumblebee...

Why this type green alage on rock in my marine tank

What is going on??? I did a water change last night because my water was green, and it's STILL green. Like worse. Weirdly enough, I just got a clownfish to go with my other one and it happened to be around the same time that my water turned green, maybe like 3-4 days ago. Do I have too many...

not sure if this is a hair algae. It seems to have leaves rather than just hairy. Also the second one is clear and just floats and moves with the current so it’s definitely not an animal or critter. But what is it? Any ideas? Thank you!

Hello everyone, I have a 75 gallon tank that has been set up for three going on four months now and I am currently battling some pretty nasty green hair algae. I completely understand. There is the ugly stage however it seems like the ugly stage has not given up once on my tank I constantly...

Hey everyone, Please see the attached videos… I need some assistance and guidance. I've been looking all over the internet and forums, but I can't figure out what this green thing is in my tank. At times, it looks like a fern shape, and at other times, it seems stringy. I initially thought it...

I was gifted a new drop in UV Sterilizer rated for a 120 gallon tank. My system is 65 gal display + a 40 gal breeder for a sump (~30 gal of water) + 40 gal breeder Refugium = 125-135 gallons total system. My water remains clear but I cannot seem to figure out my nitrate / phosphate / algae...

So this has been growing in my tank for about 4 months now, a deep green film, especially in areas of high light. It grows on the rocks, and the glass but never touches the sand. It also covers right over any corals on the rocks, it killed my bird's nest coral in a matter of weeks after getting...

Any advice as I feel like I’m fighting a loosing battle…. As you can see from the pictures I have a pretty bad GHA problem. It has been like this for a few months now (maybe longer) I’m picking out clumps weekly but it just keeps growing back, most of it is to small to grab with my fingers and...

Hi! I was hoping to get some help. I am having some growth in my tank. The first pictures are pre chemiclean treatment, the second set is after and I had the lights turned off. Any idea what’s going on? I treated with chemiclean and turned the lights off - after 24 hours this is what it looks...

I have this green algae covering the sand and the majority of the rock and need some help with ID. Photos taken around 1030pm after lights off. Tank background information: -80g AIO (upgraded from 40g and transferred fish, majority of water, and rock work. New livesand used) -Tank running...

this is in our 13.5 evo. Tank was cycled with clowns almost a year ago, once clowns died it became a home for snails and crabs. Since, we’ve added a few corals. We recently added a couple of corals and within a couple of weeks the tank is relentlessly covered in this sludgy green algae, it is...

I've had a huge buildup of green hair algae on the back glass of my tank. I scraped all of it off, and added some snails to keep it in check. I've noticed that the algae growth on my live rock and sand has gotten a lot worse, and the snails/hermit crabs don't seem to be helping. Any ideas how I...

What is this long green… thing? Is it algae , is it part of the anem?

Tank has been up 3 months or so. Not quite sure what this is. Was hopping it was a quick and easy id lol. It’s not hairy or anything just turning the rocks green I was fighting off brown string algae for about a week then this started to grow. Cuc doesn’t seem to eat it and lawnmower doesn’t...

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...

Hi All, Can anyone confirm if this is Green Hair that's starting to grow on some of the rock (the lighter rock was dry and has been curing in buckets with the live pre-tank). Tanks is around 6 weeks old and all levels are OK. I have some 5 turbo and 5 neccarious snails alongside a Foxface and...

I need to clean a rock out of water since it's full of GHA and I estimate it will take about 30 minutes to scrape it all off, spray H2O2, let it sit, then rinse with SW. I also have a mushroom on this rock but since it's on the lower part I can keep it submerged. Also, is spraying H2O2 really...

I’d like to present my lovely urchin friend who likes to eat cyano and clean my frags :) Except he’s not eating the majority of the green algae. I’ve got nassarius and one margarita. What should I get to focus on green algae? 5 gallon that’s about 2 months old.

Generally, aquarium algae is harmful for the tank inhabitants, although some algae can be the food for some creatures. But, when we change the ideas and the usage, they can enhance the ornamental value of the aquarium, something like use the green algae to decorate the fish tank. The 10 gallons...

So i’ve seen plenty of different methods to use H.P. to kill GHA The one that works best for me in to apply 1ml of 3% H.P. onto the GHA on my rocks (since they’re too big and have too many corals to just be taken out) My question is: can i use the one found at drugstores? Or do i have to go...

I have a green hair algae problem meaning i have to constantly brush them off. Before my clownfish was fine with it. today he decided to attack whatever i tried cleaning the algae with. how am i supposed to do the maintenance if he doesn’t let me?? does anyone have any tips????