Have a friend with a 90 gal. freshwater tank she got for free from a friend. She then proceeded to drain the tank, clean all the equipment and placed her fish back in. Needless to say, she has lost all of her fish but a pacu and a pleco. Now her pacu does not look good. It has cloudy eye, and is scratching up against a rock. Ammonia and Nitrates are really HIGH. She went out and got stabalizer to re-boost her biofilter, prime to condition water and add straight to tank to help lower Ammonia and nit., mardel ick treatment and fin rot/cloudy eye treatment. She also added some purigen to help make levels safe. Anything else she can do/or shouldn't be doing. Would LOVE some help, thanx nicole