Last week I started to notice what I thought was a breakout of cyanobactertia. In a matter or a couple of days, all my corals started looking stressed out. I did a 30% water change along with syphoning the sandbed and changed my carbon filters. The next morning everything looked pretty good but a few days later, eveything looked worse again. The most hardiest of my corals, kyrotonite candy cane looked the worst. The flesh was just floating away and I thought for sure he was a goner. Now my frog spawn and hammer are not looking to hot and I can see the skeleton now from tissue loss on both. I did a coral dip (brightwell) to my candy canes and they are doing a lot better but still stressed. The hammer and frog-spawn, not so much.
I started to research online today (google image) because I started to suspect this was not cyano, but something else. The algae has snot like consistency with bubbles now. This brought up a lot of info on dinoflagellates and this honestly l think is what is happening in my tank. Has anyone tried the H202 (hydrogen peroxide method by chance?
I added a protein skimmer ( CPR bak pak) last night after my nephew found one for me. Lots of micro bubbles happening but I read this was normal.

I could just use some help from anyone that can offer some good advice.
I have a couple of pics right before it started getting bad.
tank.jpgtank2.jpg

Here is my current system/specs & water parameters

46G Bow Front- 2 years running now
Aqueon 75 filteration
Ecotech vortech mp10
LED 1 55 bulbs half white half blue
CPR bak pak skimmer (recently added)

Salinity 1.025
PH 8.4
nitrites 0
nitrates < 10
Ammonia 0
KH 9
78' temp

live stock: Haven't added anything new in 3+ months
2 perc clowns (mated)
1 coral beauty
1 yellow wasse
50 lbs LR
2 Rose Bubble Tip anemone (split about 2 months ago)
30 head kryptonite candy cane
1 6 head branching hammer
2 head frog spawn
1 small frag galaxy
2 ricordea mushroom frags
1 large toadstool 1 small
different type of zoa colonys
1 orange plate coral
10 head Duncan coral
2 brain corals
1 fire shrimp
1 peppermint shrimp
a few of each on the cleanup crew..turbos, Nass snails, hermits