Wow, it sounds like there is more supplements then there is water.
A few questions and some suggestions. First STOP THE SUPPLEMENTS ALL and no water change right now as you just add more trace elements when you do.
Drop the T-5's to 6 hr you can decrease more if you have to. Leave LED's at 8 hrs. I see you have Emeralds, get 2 Sea Hares if one is bigger put it in the Main and smaller in the Frag. From the pic's and the way your rock looks your tank does not look like its been running for long, how old is the set up?
This next one should get a few comments, drop one of the skimmers if it was me I would drop the 400 gal and keep the 225 and clean it everyday to keep the neck clean. You have Cyno and that's a bacteria and you don't have enough " dum to say but good bacteria " pick up some Microbacter 7 you would need the 2L bottle. You did not mention PH or Nitrate this info would help. I don't know if you are running GFO or GAC but you will need to get some. I would recommend a high capacity GFO and TLF Hydro Carbon " only carbon to ever test 0 for phosphate " and when I said pick some up I don't me little jars you can get TLF carbon in a small bucket and if you go with Rowa you can get the 5 Kg bucket. You will also need 2 reactor you could get away with the TLF 150's, and you will need some filter floss. Go to Walmart and pick a big bag of pillow stuffing just make sure it say's 100 polyester and there is no anti mold or any type of additive. You will also need a power head I recommend the Colbalt 1200 and 1/2" tubing and a 1/2" ball valve to put in line to slow the flow. OK you want to use 2 cups Hydro carbon in one reactor and 2 cups GFO as a starting point. Put some filter floss on top of the GFO specially if you use Rowa as much of it is fine and will wash away. The flow should not be more then 100 Gal for your system if the flow is too high you will not absorb much phosphate but you will lose ALK. This is key and many do not understand this and think faster is better. If you are using GFO now then I know why your ALK is on the low side and you have like no coralline algae. The other thing I just thought of, pick up some filter socks not the felt ones get the 200 or 300 micron Poly type as the Algae dies the socks will catch the algae and they are easier to clean. Lastly, patience. This will take time because your rock is full of it and your substrate is full it. It being Phosphate.
I hope this may be some help, and good luck!
Skim
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