Cyanobacteria Or Dinoflagelettes?

[sophos9]

I'm battling a problem, quite a major one really. At first I suspected cyanobacteria but now I'm unsure - can anyone ID or does it have to go under the scope?

Things I've been doing...
Installed and internal Fluval 2 to help suck up excess
Wet skimming
Each night at the end of photoperiod I'm cleaning the entire tank inc. using a sieve to remove
Parameters are great, nitrates are 0.1ppm (yes 0.1), phos 0, cal 390, mag 1290, alk 8.3dkh, SG 1.025, temp always between 24 and 27, tunze auto top off and over 30x flow via 2 x tunze nanostream

After a night clean down, all is good and remains clean until the main lighting comes one (10hrs of 95w actinics with 8hrs of 110w 14,000k whites) in a 180ltr tank - all bulbs within 5months old.

So if this is cyno, whats the best action?
1) Keep doing what I'm doing and expect it to reduce over time
2) Add a UV
3) 48hr black out (what affect will this have on LPS corals?)
4) Add a chemical (which one?)

If this is Dinoflagelettes?
1) Add a chemical (which one?)
2) ? Any suggestions ?

Here are some photos......

Many thanks

 

[SkiFletch]

NICE TORCH!

I'll say 99% Cyanobacteria on this one, scope not needed. I'd start with a 48hr blackout, the LPS will be fine. Make sure you cover the tank with blankets, you want no ambient light getting in either. If that doesn't work, wait 3-4 days, then try a 72hr blackout. If that doesn't work, I suppose you could try an antibiotic treatment.

Out of curiousity, when did this stuff start rearing it's ugly head?

 

[sophos9]

Ski, hi... Cheers mate, that torch is doing good!

I've eyeballed this under a scope and pretty much got a match as Gambierdiscus toxicus, all the cerith and narcissus snails have died as they have been in prolonged contact, also had several turbos die when they have gone across the substrate.

Currently wet skimming, running UV, just done a 24hr black out, stopped water changes, reducing photoperiod to max 4 hrs and increasing until dino starts to expand then killing lighting and as per Shimek and Sprungs test, am raising PH as the internal PH of the bacteria is easy to disrupt.

Alongside this, I'm bedding in for the long haul - apparently its pretty often to go into months before you start winning the battle.