I have 2 tanks that I am going to plumb together which is giong to in total 400 gallons (one is 180, the other 220). I know the differnt ways of cycling the aquariums, but I am not 100% sure on how I want to cycle the tanks. The 220 is going to house large preditors, the 180 is going to be a planted. Any suggestions on ways to cycle? I am not sure if I want to add ammonia directly to the tanks or if I want to add a mesh bag of market shrimps. I know i want to go with fishless, though I might consider getting 30 or so danios which would become feeders to the bigger fish. Thoughts and Ideas most apperciated!