Is this GHA

[shadyraro]

Can someone tell me if this is GHA? I believe it is and have a fair bit on my rocks. Tank is 1.5yr old 60g brought second hand with the rock, phos and nitrates are zero. I plan on removing the rocks tomorrow during a water change to try and remove it and scrub it off. I don’t want to use any chemicals at all, I have lots of various snails I believe some turbos, astraea and Nass and 6 fish including a lawnmower.

 

[I never finish anythi]

Please a picture under proper lighting would help .

 

[shadyraro]

Sorry

 

[salt creap]

Sorry

definitely gha - more turbos snails and blue leg crabs and lower phos and nitrate is probably on the high side

 

[shadyraro]

definitely gha - more turbos snails and blue leg crabs and lower phos and nitrate is probably on the high side

What should the phos and nitrate levels be at?

 

[salt creap]

less than what yours is rn…lol depends on the tank and demand by corals but i have a lot of lps and ephyllia so i keep my nitrate is around 10-15 cuz my babies like it lol if i had to guess phos is 0.1 or lower i dont test phos, only nitrates,tbh because when those get high the phos is usually starting to as well. i water change 15%weekly which maintains mine based on what i feed/bioload

 

[Dburr1014]

Sorry

This looks like bryopsis.
Pull some of and spread it out on a paper towel. Take a pic and post. If it's fern like, you have bryopsis.

Bryopsis algae: 5 important things to know about the problem

Nothing is more frustrating than dealing with a problem algae and no problem algae are more frustrating than bryopsis algae, the scourge of the reef aquarium hobby. Table of contents Proper identification How bryopsis algae get into your tank Prevention How to keep pressure on it How to treat it...

www.saltwateraquariumblog.com

This has a fern like appearance like bryopsis. A better pic will tell.

 

[AydenLincoln]

I thinks it’s GHA! An urchin will eat it.

 

[I never finish anythi]

It looks more like bryopsis to me .

 

[_Jake_Simek_]

I thinks it’s GHA! An urchin will eat it.

For me my urchin ate it, but only if i kept it short for him. Once i did that it was all gone in a week.

 

[shadyraro]

This looks like bryopsis.
Pull some of and spread it out on a paper towel. Take a pic and post. If it's fern like, you have bryopsis.

Bryopsis algae: 5 important things to know about the problem

Nothing is more frustrating than dealing with a problem algae and no problem algae are more frustrating than bryopsis algae, the scourge of the reef aquarium hobby. Table of contents Proper identification How bryopsis algae get into your tank Prevention How to keep pressure on it How to treat it...

www.saltwateraquariumblog.com

This has a fern like appearance like bryopsis. A better pic will tell.

I had a good look and there’s no fern like grass at all, so I’m pretty certain it’s GHA.

 

[sixty_reefer]

The algae seems standard GHA. You will need to raise your nutrients as soon as possible before it gets worst.