Heres how I do it. I just did another 10 gal this week. The only tank I've owned that went thru a cycle was the first one 5 years ago. Every other tank has been seeded from that one. Easy :!:
From an already established tank, at least 4-5 months old, take some plants and filter media or plants only and put them in the new tank. Plants work the best. The more plants from an established tank ,the better. The plants serve 2 purposes:
1)they use fish waste to grow.
2)they're loaded with beneficial bacteria.
If you don't have plants from an established tank, filter media from an existing tank or the whole filter will work.
By now you should be getting the idea. "Dirty" bacteria laden material from an existing tank plus plants and you got the makings of an old tank....almost. Keep your stocking levels low at first and gradually add fish over the next couple weeks and monitor ammonia as a precaution. If you follow these suggestions your tank probably won't see any ammonia and it'll be cycled almost instantly.
FILSTAR Pimp #2
75 gal heavily planted,50/50 Black beauty,Eco-complete substrate, Pressurised CO2 with solenoid, ph controller, AB Reactor 1000, 330 watts 9325K GE PC lighting,Ehiem Liquidoser, 2-Filstar xp3 canisters.