Does anyone keep some Red Kelp for any chance?

[ConectadoNZ]

Top 5 Most Desirable Algae for Reef Aquariums

Not all aquarium algae is bad. In fact some algae is very helpful in reducing nitrates and phosphates naturally, as well as providing fresh food for your fish, and a refuge for smaller reef critters vital to your aquarium's ecosystem. Some are just ornamental, and add a natural aesthetic quality...

www.asap-aquarium.com

 

[N.Sreefer]

That is gracilaria I believe which is a very palatable treat for tangs and has great nutrient uptake ability. However it CAN go sexual

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[SPR1968]

Some of the micro algae are beautiful and would look stunning in any reef tank, provided you go for non invasive species

The problem is many fish will just eat it, in particular tangs so they can often become an expensive snack! I tried it myself and it lasted about 3 minutes before nothing was left