yes started with some live rock and dry rock,also marine pure i had taken from sump of tank i am pulling down, ammonia went 2 0.25 on day 2 and 0.5 on day 7 and 0 on day 11 and has stayed there nitrites 0 nitrates 5, i have put in raw prawn and frozen brine shrimp, also Zeobak, Diatoms started day 7,GHA started day 12