Saltwatertanker. Thanks for posting, I see you live in Guam. I never dove there or even visited there. It is on my list, mainly because of the military history of it.
I have also seen cyano and plenty of hair algae in the sea especially in the Caymans.
I know people in the hobby go nuts over it and I don't know why. Hair algae is viewed as a disease instead of a health giving, natural substance that should be cultivated in a way that benefits the system. We farm crops and they help us live but we don't let them grow in our living room. Well I don't anyway.
Hair algae is a plant, it makes oxygen and removes all of the things that people spend a fortune on trying to remove with vodka, vinegar and pellets.
It seems like every other post reads something like "I have Hair algae and I am about to throw in the towell".
I don't want it to grow all over my corals either but I do want it in the system someplace. If you have no algae, something is wrong. Tap water doesn't have algae in it but if you leave it out in the sun for a couple of weeks without putting anything in it, it will grow plenty of algae. I have ponds filled with tap water and no livestock. Algae grows all over them, it is natural and just need to be controlled.
Cyano is a little different but it is part algae and dependant on light. It is also part bacteria and seems to grow sometimes for no reason. It will grow profusely with excess nutrients and look horrible but it won't harm anything unless it covers corals.
That is easily removed with an oxidizer like Chemi Clean which means you may have too much DOC and are probably feeding too much or not exporting enough.
It seems to run in cycles and sometimes just grows for no noticable reason, then sometimes it disapears for no aparent reason.
Some filthy tanks have it and some pristine new tanks have it.
Tanks with no circulation and tanks with tidal waves.
I do believe in having a stable tank, but also remember that life can adapt to certain changes.
I am glad you mentioned that. A tank has a fairly stable existance but the sea is vastly different.
Living in Guam I am sure you know that.
I have been in the South Pacific during a mild typhoon and it is amazing anything is growing.
I have also been in the Caribbean after a hurricane and there were sea fans 100' up on the mountains. Brain corals bigger than my car turned up side down. Reefs covered in 5' of sand.
I do this to my reef a few times a year, these events are the vacuum cleaners of the sea. I feel corals need this cleaning and I power wash my rocks whenever I get time. Rock is porous but it doesn't stay like that, all those creatures in there die and deposit their skeletons all over the nooks and crannies. You need to do a little maintenance like the sea does and clean this stuff out. This is the main thing I have against DSBs. They can't be maintained, they are static. No, the tiny creatures that may inhabit them for a few years will not do it. That is why we don't see a bunch of 10 year old DSBs.
I blast my gravel down to the UG filter. Everything flies all over the place and I have always done that. The sea does it and I feel it should be done. :wave: