Is Halimeda causing bacteria bloom.

Pic would help. I’ve had problems keeping halimeda alive long term but it’s usually white when it first arrives.

For bacteria blooms I usually do a big water change and run carbon.
 
Bought 10lbs of live rock to seed the rest in my 55. Most of the halimeda is grey, and tank is cloudy. Should I pick off what I can or let it ride.
Pic of macro under white light?

Sounds like possibly the macro was stressed and went asexual. Looking at the macro could tell you for sure, but leaning towards that, as halimeda will go grey and be very soft when it does this. If this is the case, skim wet, run some carbon and do a water change if you can. If the tank is fish heavy, throw an air stone in or point powerheads more to the surface, as the cloud of goo can deplete oxygen.
 
Only livestock is the couple corals that came on the rock.
Ok cool. If the macro is very soft, go ahead pull it. Halimeda is a firm macro, so soft is bad. Leave the footholds (roots) and it will grow back. This will help parent nutrient levels from elevating.

As for the corals, it can be an annoyance to them, so the same applies, minus maybe the airstone or powerhead at the surface. But won’t hurt if you add it/adjust them.

Side note: what corals did you end up with?
 
Ok cool. If the macro is very soft, go ahead pull it. Halimeda is a firm macro, so soft is bad. Leave the footholds (roots) and it will grow back. This will help parent nutrient levels from elevating.

As for the corals, it can be an annoyance to them, so the same applies, minus maybe the airstone or powerhead at the surface. But won’t hurt if you add it/adjust them.

Side note: what corals did you end up with?
Scratch the last question. I think we already ID’d them lol.
 

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