What is this type of algae?

After a long battle with hair algae, which I finally defeated, I have a new type of algae which is very repulsive looking. It is brown in colour and when I have just the blue LEDs on it appears to be a deep red/ maroon, similar in colour to coraline algae. I scrubbed the rocks about a week ago and it is back big time.
As I said, it is brown and not a green colour as it appears in the video.
Can anyone tell what I am dealing with please.
Algae! - YouTube

 

i believe its a Cynobacteria

 

Thank you for the reply. I don't understand why I can't shake the algae problems. My parameters are always good, except for carbonate hardness, I just can't seem to keep it up at an acceptable level. I do regular water changes and I use RO/DI for top ups.

 

Your params may be misleading as the algae is probably using up all of the phosphate or nitrate therefore showing zero on the test. A couple things to consider are feeding, blowing detritus off of the rocks and sand bed and regular water changes. IME a fuge with some chaeto makes up for quite a bit of overfeeding as well.

 

I do blow the detritus off the rocks regularly, and vacuum the sand when doing water changes. I do about a one third water change every two weeks. I don't really have the room in my cabinet for a fuge. I have searched around for chaeto but it doesn't seem to be available here, people don't know what it is when I ask for it. I usually only feed once a day and I don't think it is a big feed, it's eaten in a few minutes.
Here is a pic of my cabinet if anyone has any ideas on a fuge where I can still fit all my pumps and protein skimmer, it have updated to a larger Reef Octopus skimmer since that photo and it takes up even more room. The center support makes it difficult to fit a fuge.
The algae problem seemed to get worse when I changed from T5 to LEDs. I tried turning them down but it didn't help.

 

That's a clean setup you've got under there!

I've heard those bio ball trickle filters can turn into nitrate factories, could that be causing your algae bloom?

 

It could well be. I would like to get rid of them and get a fuge but I would have to remove the centre support and I am worried that the weight of the tank will be too much and it will collapse. The tank is rather tall so there is a lot of weight.
Here is an old photo of the tank, before algae problems.

 

Google the images found with the words "dinoflagellates aquarium".

 

It looks like you have a combination of Cyno and Bryopsis algae going (it's hard to tell if it is Cyno or not from the video). I would recommend staying on course with your water changes but cutting your feeding in half (that's all feeding including any coral feeding). I would also recommend adding at least a GFO reactor if not a dual Carbon and GFO reactor. Something is feeding your algae and you have to take that out to starve the algae. Bulk Reef supply .com has a nice simple dual reactor that should fit in nicely with your current filter setup. Also to help get rid of the Bryopsis get a big thing of Kent Tech M Magnesium and bring your Magnesium level up to probably double what you’re getting from your salt. Tech M has something in it that kills off Bryopsis so I wouldn’t try using another type because the Kent is the only one I have ever heard that takes care of this. Also realize it's going to take time (months) for you to get rid of it, but if you stay steady it will go away. Be sure to suck out what you can when you do water changes as well. I’m currently fighting the same battle and have noticed a difference since implementing these things.

 

when i see a great setup like you have and i don't believe you over feed and i believe you are using ro/di water your doing everything as right as i can see so whats the problem? are you using a reef salt if so imo don't use it for awhile and just use instant ocean and don't do 30% water changes just replace water as needed for a month and let your tank use the chemicals it has, use a 2 part cal and alk after the month to bring levels back to norm then 5% water changes about every week should do it, i don't like to use a salt mix as my guide to what my tank needs and this is the reason if you had the right amount of corals that would use the chemicals in the salt mix at and even flow and your skimmer got just the right amount of skimate this would be a perfect world and all would be well, imo this isn't the case, chemicals are used in uneven amounts in the reef aquarium and by doing that large w/c the one's the tank didn't use build up so the more you change the water the worst the algae gets so be careful with the w/c and get the tank as even as you can, stable is the word. add fans to the tank for evaporation and just adding good ro/di water imo is as good as a w/c and will not help algae to strive.