I love your latest FTS Matt. Thanks for sharing it. Please upload your FTSs regularly, so that we can see your corals' development. I wish my tank was large as your tank.
I have made very good progress with cyano. I think that the time is right to share my strategy with you.
As I reported in my tank thread a while ago, since I started to use Tropic Marin NP bacto balance at the beginning of last March, cyano on my sand bed have completely gone. However, the presence of bacteria persisted on some sections of the live rock and some sections of my overflow box despite regular syphoning of the slime and blowing rocks with a turkey baster.
At the end of last month, I decided to use KZ biomate after reading users' report that it clears live rock from mulm and detritus (I do not know what the difference is!). I hypothesised that if this product really clears detritus from live rock surfaces, then cyanobacteria should loosen their foothold on these surfaces and will eventually be outcompeted by bacteria contained in KZ biomate. Having read the prominent zeoheads' advice on dosing on the zeovit forum, I started to dose KZ biomate twice the recommended dose twice a week. I supplemented the dosing with KZ coral snow and zeobak mixture twice a week too. I am happy to report that my live rock surfaces are now 95% clear from cyano. The only surface that still harbours cyano is one section of my overflow box. This is a massive improvement. It seems that nearly four years of struggle with cyano may be coming to an end. Watch this space.
As for bubble algae, I have found that excessive organics exacerbate their presence. Similar to aptasia, I firmly believe that you cannot completely eradicate this particular algae. Its spores seem to survive any assault on its presence. Manual removal without bursting is reported to be the most effective method. If you cannot remove it, do not try too hard, just let it grow as big as it can. Once it gets really big, then it will be very easy to just lift it from live rock without any risk of bursting it. If you resort to biological means, then some reefers have reported success with foxface rabbitfish (Siganus vulpinus). Use of emerald crabs is a hit and miss at best. These crabs will try to have a go at your fish once they grow. Trust me they will grow...
I hope this helps.
Bulent