Recovery Saltwater Aquarium Bleach Scub Pad Accident

OK so My new wife has had this established 75 gallon salt\water tank since we met. It was property of her late husband so neither one of us knew how to keep it. I was doing the routine water change and cleaning the intakes for our magnum 350 filter intake. Problem is that I used a conventional scrub pad.

Now I have a bleach issue. It killed all of the fish. Now I am trying to save some of the mobile invertebrates, sessile invertebrates and the live rock.

To date I have changed 50% of the water volume day one and day two. Day two I changed the filtration substrate and cleaned the assembly. Ive been using Ammonia Lock to attempt to neutralize the Chlorine and pairing that with Buff to try to stabilize the PH. This seems to reinvigorate the survivors for several hours at a time. Ive been refilling the tank in 2.5 gallon increments with fully treated and balanced water. This also seems to reinvigorate the surviving invertebrates. Also, Ive been attempting to remove dead specimens.

SO far these efforts have not included dead or possible dead corals. Mostly because I cannot tell the difference. Mushroom polyps are incredibly difficult because they have often appeared dead in the past when other incidents have occured with the water quality.

Does anyone have any Idea how I can stabilize this aquarium or save any of the animals contained within?

Welcome to our forum. I hope one of our saltwater experts will offer more help. Since saltwater aquariums are more complicated than freshwater tanks, they're more suitable for experienced aquarists.

The usual partial water change is 20 or 25 percent. The larger water changes will dilute any toxins that are in the aquarium. Dead and decaying food, animals and plants produce ammonia and other toxins, so the water changes are very important.