Dinos?

[NS Mike D]

What do you think? I have been aggressively scrubbing my rocks (twice a week- more often lately), changing water, creating a lot of turbulence to kick stuff up into the overflow, using filter socks and changing them twice a week.

This stuff scrubs off easily, but it regroups as strings very quickly before it can get sucked up into the overflow.

I started dosing 3% hydrogen peroxide (2 ml daily) which has helped a lot but a few of my acros are bleaching so I stopped yesterday and did another water change.
29 gallon DT
5 gal CPR HOB fuge full of cheato
10 gal DOY sump with rubble rock and cheato

Salinity 1.025
pH 8.3
Alk 9.8
Calc 430
Mg 1400
Temp 78°
NH3 0
NO2 0
NO3 0.5
PO4 0.06

I made significant progress attacking this stuff for months, but it still grows back/re-clumps by the end of the week.

I do have 4 astrea snails, 1 emerald crab, 2 hermits, a few narciusus snails and a tuxedo urchin work the rock work.

sample pics

Here you can see it covering my sponge and zoas to the right side of the pick. You can see how it quickly forms stringy clumps. When I scrub the rock work, it quickly re-clumps on any surface including the acros before it makes it to the filter socks

Not sure of this is two different algae/bacteria, this might be only GHA

Before dosing hydrogen peroxide last week, my approach was manual removal (brushing rockwork) while encouraging coral growth. My NO3 was 3ppm last month, it's dropped to a low of 0.6ppm recently, I assume do all the cleaning.

I do have some cyano and red turf algae mostly under control (receding nicely)

thoughts and suggestions? Do you think the stringy stuff are dinos?

 

[Idoc]

Fi you have access to someone with a microscope? Its hard to guess, and that will definitively tell you what you have. Reclumping and bubbles is very suspicious for dinos. But the 2nd picture looks mostly like gha?