I used Real Reef rock and Fiji Pink live sand. And I would love to set up an algae scrubber but it's just not doable in a BioCube. I have considered adding an InTank refugium basket and filling it with chaeto but I don't know how much that'll help since HA grows faster than chaeto in my experience.
Here's some pics before the HA got bad.
And here's how it looked at its peak.
And this one is about a week or two old, before my last big cleanout.
I was seeing some great results when I was running GFO, doing weekly 25% and dosing Vibrant. I guess I just need to stick with that regimen again and keep at it.
K first off. GREAT TANK!
IMO, IME, my .02
heres my take on algae. Dont let it in the tank. most dip for bugs(bayer), few dip for algae, if they do, they don't even realize it.(revive), and nobody likes to qt corals.
AIO's. they have thier limits and imo are harder than most tanks including my old 20l w the aquaclears. stuff gets trapped in the back and rots. its hard to get a skimmer in there but really you should if for no other reason than gas exchange. so keep it running.
Sand. go dsb or shallow enough to vacuum. and then vacuum. with no sump(large gravity filter, yea gravity) particles that dont get skimmed or trapped go back in the tank like dust and land on the sand.
the tank is so new the bio filter and micro flora and fauna have not balanced themselves.
CUC, if I cant see them in the picture you dont have enough. once you beat down the algae, snails eat stuff you cant see. sprouts and seeds and spores and eggs and diatoms and dino's. get a variety. it really does work.
Algaecide. Im not opposed to them. But understand what they do(even though nobody knows what vibrant does or side kills or will admit to it.) Its getting good results at killing, it will take some time. so once you have it on the ropes, get something to eat it(snails) and then be prepared to rebuild the biofilter as i'm pretty sure it effets that too.
AIOs have thier limits. I abandoned my JBJ cube because I couldnt make it do what I wanted esp as far as food and export goes. besides the light being horrible, the recommended skimmer was trash. and i wasnt about to hack it to the extent I should or could have because I figured a new tank would be cheaper. so they do have their limits.(to make it easier on myself I went with a 30 cube and back to my aquaclear and $14 hob fuge, no really i did.)
There's nothing wrong with chem filtration(actually export) and in an aio, besides mechanical is can be your best friend, but just watch how much it pulls out. this from the guy who advocates promotes the $14 hob refugium, but that's hard to do on an aio. so changing the technique for nutrient export is a must. chem or even look into a macro reactor.
Forgive me if im suggesting stuff your already doing, im just blurting out suggestions and hopefully making ya think a bit. Your awfully close to success. and FYI, a tank really changes after a year. and after two its a different animal. like a puppy. or husband.