I followed what was recommended by one of us in the forum/ discussion which was immediately do a 30/40% water change, change the filters and slowly( every 2 hours) add a tablespoon of Epsom salt per 10 gallons of water its a 75 gallon aquarium and the only other surviving fish is a bottom feeder who has withstood her attacks and has grown with her and now she just ignores. The tank had cycled 24 hours and then we did a 80% water change and added what’s in the photo below or attachedHey, that's an Andinoacara rivulatus, Green Terror 'Gold Saum'! A female? (And yes, dominant grrrlllzzz of this species can grow those nuchal humps, as well)
A Cichlid species originating from South America!
So..... what exactly did you treat the tank with? Was it API Algaefix?
With that info, plus maybe one or two more follow ups.... we will hopefully be able to get you fixed right up.
- How big is the aquarium?
- Besides the Green Terror and Pleco, who else is in the tank?
- Have you checked/measured the water for Nitrates?
- How long has the aquarium been running?
The Green Terror is a male. Broad, indistinct orange band on the caudal, heavy orange on the dorsal, with long, flowing fins. Body color very solid iridescence, which females do not possess. And of course, it does have a nuchal hump. Nothing about this fish suggests female.
Do not add any more salt to your water changes, and just keep doing water changes. Time and patience are your only needs right now.