Just a heads up. I bought a gallon of amquell plus from big als and did a few water changes. It killed 2 large green severums, 2 small uarus, in my 125 and unknown number of pristella tertas in my 75 gallon. Make sure your waterconditioner is not toxic. I'm not sure how this happened. I did 2 other tanks the same day using prime and havn't had any caualties. The amquell I got doesn't smell quite right.