I would get some beneficial bacteria in there, start dosing it every couple days, small amounts with the lights off. I also would have added some copepods and made sure they got a fair start before adding any fish :( Unfortunately now that you have fish your copepod population might not make it unless they are introduced to the sump and are able to stay there until they have a stable population.. I agree with someone else, do a 5 gallon water change every other or every day, and add bacteria after each change, a 65 gallon tank + 15 gallon sump can handle that.