Filamentous algae ID

[ZipAdeeZoa]

So just finished treating my tank for bryopsis with Fluconazole (apparently effectively) but it appears in that time that I postponed weekly water changes for 2.5 weeks that something else has taken a hold!

I noticed it covering most of the rock work with very short hairs that appear to be white but whats really concerning me is the green flowing filaments perched in on particular spot. Pictures of both below- I didn’t test nitrates during the WC hiatus but until that point they had consistently remained at 5 ppm, haven’t checked phosphate but I have the Hannah ULR phosphate checker on stand by if that would help. If this is just part of the uglies then awesome but I figured I’d ask just to be sure, photo with the blues shows the height if the strands better, white show the color.

Type 1

Type 2

Thanks in advance!

 

[Sashaka]

I'm not sure what the algae is that you're seeing, or even if it is an algae and not a bacteria bloom, but I had a similar experience after using Fluconazole for Bryopsis. I also got another type of algae/bacteria bloom after treating and had to go two rounds with the Fluconazole to kick the new problem. After the second treatment, I quickly did larger water changes for several weeks about three days apart and then a lights out for three days to prevent new algae from cropping up after the second treatment. That seemed to work for me.

 

[ZipAdeeZoa]

I'm not sure what the algae is that you're seeing, or even if it is an algae and not a bacteria bloom, but I had a similar experience after using Fluconazole for Bryopsis. I also got another type of algae/bacteria bloom after treating and had to go two rounds with the Fluconazole to kick the new problem. After the second treatment, I quickly did larger water changes for several weeks about three days apart and then a lights out for three days to prevent new algae from cropping up after the second treatment. That seemed to work for me.

Thanks!

It interesting that it happened to you to, I read on the fluconazole treatment thread that it can give other algae a chance to take hold but I figured with a bioload of a single hermit crab I wasn’t to concerned. Although know I’ve doubled bioload because I got a second hermit crab.

I might just see how the crabs handle it before I try a second treatment until I know what I’m up against. I did get a second tab of fluconazole to have on stand by unless one treatment wasn’t enough so we’ll call that plan B!

 

[ZipAdeeZoa]

Would anyone else like to take stab at it? Any tips on how I could make the green stuff stand out better in photos?

 

[SuncrestReef]

Do the white filaments look like this?



If so, then you have hydroids. Here's a macro close-up:



I had these mostly in shaded area of my tank for about a month or two, then they went away on their own. Not sure what caused them to appear or to go away.

 

[ZipAdeeZoa]

Do the white filaments look like this?



If so, then you have hydroids. Here's a macro close-up:



I had these mostly in shaded area of my tank for about a month or two, then they went away on their own. Not sure what caused them to appear or to go away.

Thanks!

I haven't seen the flower like structure on the end of any of them like the ones you pictured, is that something they only develop at a certain size? So far I'm going to say they that doesn't look quite like them, I might pull out my actual macro lens (pics above where with the polyp lab macro) and see how things look 1:1. With the naked eye they seem to have a more bulbous tip at the end and some pieces seem to branch.