Wits end with dynoflagellets

[JJ-MIK]

I have 150 mixed reef with 55 sump. I have 4300 gph flow. Reef octopus skimmer Tao led lights on for 8 hours. Feed 7 fish once every 3 days. And recently added a DIY reactor with brightwell extraxphos . All levels are zero. Ph is 8 kh is 10 calcium 500.. Mag is high around 1800. Dyno is thriving in my tank. Clean it out by hand 30 g water change weekly and it grows faster at night with the lights off.. Dosed hydro peroxide 3 days 10ml then 50 ml. Then 150 ml last night. Woke up this morning and it grew even faster..shut the skimmer off for 2 days and it slowed.. Turned back on and they grew again.. Too much oxygen?? . Next stop is a sledge hammer... Someone please help!! Tank is 11 months old. Corals are doing great. Fish look ok. Lost 2 wrasses and a clam in the last 2 months since dyno started.. Thinking take corals and fish out and black out the tank for 10 days?

 

[JJ-MIK]

I just did some reading. And I found out that dyno thrives on clean water. Stop doing water changes and either dose nitrates. Or let it naturally rise.. Keep siphoning and it will go away.... Thoughts?