Thank you!

Find the cause of the BBA. If you did that long a blackout and it came back, then you have something else causing it to rapidly bloom like high silicates, too much light, too long light, etc. Keep at it, you’ll get it. But, when all else fails, RESCAPE 🤘😁

your suppose to do a bunch of water changes after wards. anything that dies during the blackout period just adds the excess nutrients that caused the problem to go back into the water. and hence it'll repeat.