I will do my best to describe how I recently beat my recent dino battle.
Back story- understocked tank, huge upgrade in lighting, small algae bloom, suddenly 0 N03 and 0 P04- Dinos attacked and beat me up for 9 months- tried a few things along with black outs- always returned to full force within 4-6 days of lights back on.
performed 5 day blackout(no covering tank or anything just lights off) , turned skimmer all the way dry and cut from 24 hrs/day to 12 hrs/day- fed fish normal. changed floss in filter cups every morning.
on 4th day of blackout started dosing microbacter 7 heavily- at least twice the dosing rec. daily
also started dosing(supposedly live) phyto- heavy daily, added about a million dollars worth of live pods all the different species I could find local- somewhere around a 20$ bottle every other day to every 3rd day for 2 weeks
Lights on- fed fish heavy-- like hard to do heavy-- - as much food as I could bring myself to put in the tank(note I feed only frozen and nori)
fed stupid heavy for a month while stuffing my new tangs with copious amounts of nori at the same time
tripled my clean up and algae crew
left my skimmer on the dry setting 16/16 but running 24hrs a day
resumed normal 2-3day filter floss changes
dinos did not come back
no water changes for 10 weeks
p04 did get as high as .15- didnt bother with n03 testing as my prior experience showed me the dinos return the second p04 dropped to 0.00 even with elevated n03
about 3 weeks after lights on started feeding closer to normal, but more than I used to ( I think I fed too light- fish seem fatter/healthier and happier).
This may not work for anyone else, and I dont know what species of dino I had, but I am a firm believer in dinos being caused by an irregular balance in this mini eco system, not an imbalance, just a bad balance- I approached them the last time just thinking I need to foul out the current balance in the tank and then as it reestablishes, push it in the direction I want it to go.
Its been about 3 months now with no signs of dinos and everything in my tank is looking better than ever, maybe I just got lucky the last time, or maybe there is something to the balance theory.