Sorry im asking alot of questions but unfortunately the answer to whats causing the algae isnt always very apparent and sometimes its a combination of things.
I looked at the video again on a bigger screen...there seems to be alot of coralline in the tank. Are you using any kind of purple up or coralline algae accellerator? What else may you be dosing or adding to the tank that would make the water nutrient rich?
As you have seen the bad things in reef tanks happen very quickly and reversing the effects can take days or weeks, so the more you can narrow down the problem and correct it, the less severe the problem will become.
I almost have no coralline algae, it's my phone picks up light. Will take another video with natural light.
Only thing I dose it kalkwasser
Was thinking to start some Magnesium current level is 1150
but after I'm done with algae.
Well if there was no algae before the lights intensity was increased and started shortly after, then that is a likely cause.
I would have left the rock in there and just decreased the lighting back down to what you had it at prior to the algae bloom. I would also pick up some kind of chemical filtration media, chemipure elite or blue, to absorb any po4 that may be in there.
Recently had a algae problem that i attributed to my lighting. Was running a T5 fixture and the bulbs were well over due for a changing. All was good for the first 3 months and then over the course of a week i had cloudy water, alot of really fine brown algae growing on the upward facing rock surfaces and was changing the filter floss daily. Same as you, the CUC wasnt making a dent or able to keep up with it.
Upgraded to leds, slowly acclimated the light from a low intensity and increased in small increments once a week. Now about a month later, the algae is almost non-existent.
After the algae clears up, slowly increase the intensity till you get it where you want it.
Nothing helped from all suggestions, so I'm on the 10th day on antibiotics Fluconazole.
It was recommended to keep it for 14 days.
This weekend I will fry to siphon some with airline tubing... I'm thinking if antibiotics did something to it, at least I will be able to siphon it off from rocks.
Sand is different story I may need to by some reef sand and just cover this mess up.
In included short video you can see how algae transforming from almost clear fuzz to brown bunches (maybe it's going away )
Hi 0 nitrates is def falling out of favor with most reefers these days just from others I talk to and personal exp try keeping 5-10 ppm some ppl dosing nitrate to bump them up
That being said I think algae bloom can happen in tanks less then yr even 2 yrs old def wanna keep turbo snails they are awesome