What algae is this from Gulf Live Rock

[SirSaltyNutz]

Oh I see, thanks. Since I still have it "contained" would treating with fluconazole be smart step? I will remove the red grape algae and codium that where nice hitchhikers to get.

I'd say that if it's contained enough to remove, just start with removal. If it is left in the tank it will either proliferate, creating a larger issue, or it will die-back and you have nothing to worry about. Chances are that if it started out smaller, it will continue to grow and spread. The closest analog in freshwater would be black beard algae (BBA) in my opinion. Holds on tight, and the environmental conditions are more important than manual removal.

I can't really weigh-in on the fluconazole. It's something I've read about but I haven't tried it myself fortunately/unfortunately. Personally I'd use it as a last-resort, but part of that is I haven't needed it before.

What do your water chemistry parameters look like? How long has the tank been set up? Perhaps we can find some alternative options. If you're carbon dosing to reduce nitrate (pardon the pun) that may contribute according to Mr. Sprung. Anaerobic denitrification will reduce some nitrate to nitrite.

Thanks for you reply and suggestions. I have the Live rock (Gulf Live Rock) a quarantine 29 gals that has been going for 7 weeks. The Display tank was not ready, plus i wanted to check for types of hitchhikers, good and bad. The good, sponges, Watercress Halimeda Algae, Watercress Halimeda Alga, Turkey Wing Clam, etc. so my water Salinity 1.0265, temp 78oF, Alkalinity is 9 dKH, pH 8.0, NO3 is 35 ppm, PO4 is 0.1 ppm .... So to explain the high nutrients numbers I have been dosing conc Phyto feast for the bivalves. I have cut this back, plus week 25% water changes. Probably do more water changes too. NH3 is always 0 ppm.
Display tank is cycled and ready for next phase, just need to get this algae under control before transferring. This why I am thinking about fluconazole to help ensure a "clean" start. Probably foolish, like dosing phytoplankton for the clams.... Learning

 

[Goby]

For a small patch like that, I’ve had luck with taking it out and chipping it off with an old wood chisel and a tack hammer. I’ve also found peroxide to be helpful with controlling some algae, though it usually comes back over time.

 

[Privateye]

Ah, your situation is a little unusual then. Definitely less risk than dosing fluconazole directly into the display tank.

It may behave totally differently after it's transferred. It could disappear on its own even, but I'd at least remove what you can. Or treat it. It's not a fun algae to have take over, but it doesn't do that very often IME.

 

[SirSaltyNutz]

For a small patch like that, I’ve had luck with taking it out and chipping it off with an old wood chisel and a tack hammer. I’ve also found peroxide to be helpful with controlling some algae, though it usually comes back over time.

I did take out the rocks and used heavy duty tweezers to dig out what I could of any roots. Then used a 12% H2O2 soaked qtip and applied to the area to maybe kill the roots. Time will tell. One cool thing I did noticed was the other life. Couple different red macro and brown(?) algae. Some thing living under the starlet coral, it's pink, best description is looks like a tongue. I can see it thru a small hole. Seems like it may have mouth that I see open and closes when a light shines on it... anyways more to learn, just need to be patient.

 

[SirSaltyNutz]

Ah, your situation is a little unusual then. Definitely less risk than dosing fluconazole directly into the display tank.

It may behave totally differently after it's transferred. It could disappear on its own even, but I'd at least remove what you can. Or treat it. It's not a fun algae to have take over, but it doesn't do that very often IME.

Yeah, I think take this time to see how I can "naturally* remove Bryopsis but will used the more aggressive approach if that fails. I will post with updates.