Brown algae covering corals

[Andreas' Reef]

Hello. Brown algae has been covering my corals and I don’t know why. Params are normal and the algae is causing the corals to close up. Does anyone know why this is happening and how I can fix this???

 

[Ryde]

White light picture?

 

[Andreas' Reef]

White light picture?

 

[elorablue]

I wish I could help on the why and how to fix but when I had my diatom bloom a couple of weeks ago it managed to completely cover my toadstool and my devils hand leather. Both are new frags. The toadstool just managed to shed it off a couple of days ago after I moved it to a high flow area and is now back to normal. The leather , however, is not responding and I'm a bit worried it may be too far gone.
Maybe try moving it to high flow?

 

[Andreas' Reef]

I wish I could help on the why and how to fix but when I had my diatom bloom a couple of weeks ago it managed to completely cover my toadstool and my devils hand leather. Both are new frags. The toadstool just managed to shed it off a couple of days ago after I moved it to a high flow area and is now back to normal. The leather , however, is not responding and I'm a bit worried it may be too far gone.
Maybe try moving it to high flow?

My baby green toadstool is slightly covered too but It is better that it was yesterday

 

[outhouse]

Hard to tell by pics if its diatoms or red algae, or dynos, either way blow it off with a turkey baster and try and net as much as you can out. I personally do 50% + water changes when I see that sort of imbalance. Its usually a sign of bad things about to happen, which tends to start before you really notice your water test sliding. Chemi clean has worked for me over the decades followed by major water changes. first determine what you have so you can properly treat it

 

[blasterman]

If its stringy its dinos.

Diatoms won't damage corals but can aggravate them. Dinos if they get thick enough can hurt corals.

 

[Donzidan28]

Hard to tell by pics if its diatoms or red algae, or dynos, either way blow it off with a turkey baster and try and net as much as you can out. I personally do 50% + water changes when I see that sort of imbalance. Its usually a sign of bad things about to happen, which tends to start before you really notice your water test sliding. Chemi clean has worked for me over the decades followed by major water changes. first determine what you have so you can properly treat it

50%? Wow, that would be 100 gallons for my tank! I have never done more than 30-40 gallons at a time and thought that was a lot. I’m following.

 

[outhouse]

50%? Wow, that would be 100 gallons for my tank! I have never done more than 30-40 gallons at a time and thought that was a lot. I’m following.

Understand. I have a 210 with 100 Rubbermaid sump. Having another 100g Rubbermaid sump with a float valve plumbed in to my sump, and auto top off makes it easy to do 100g water changes. Takes 10 minutes now.