I have read articles on fishless cycling. I also struggled to get a 65 gallon cycled in the recent past. I want to do it right this time. I have two ten gallon, a twenty gallon and the 65. All tanks are Malawi, hopefully males. I plan on populating the 210 with the 30 fish in these tanks. I added extra foam filters to the four tanks as I heard these will be good source to seed the new tank. I also read to move some gravel from the four tanks to the new tank. How about water from the existing and some of the decorative rocks? Anything else? I know to do testing for ammonia, nitrates and nitrites. I plan to keep the 65 gallon as a grow out tank and the twenty for breeding and fry.