Just got him in yesterday.. Guessing he outgrew his tank from the person who traded. Our parameters are great, i test every other day with ammonia and nitrite at 0 and nitrate at 10 ppm. Running huge sand filters with 300 gallon bats under all tanks full of bio balls. We have three systems, one running 20+ 3-4' rtc, paroons sharks, 18" rays and a 265g full of oscars and pacu. Filtration is top notch.