can you tell me where you got the berghias??The nuking from orbit is the guaranteed approach. However, for that size of tank I would try to get 3-4 berghias and see how they fare. They usually wipe them out but sometimes aiptasis come back after a few months (2-4 months is what I saw most frequently, mine haven’t made a comeback yet.) If the nudis are a good size they will clean that tank in a month or so.