Help

So I just got a 90 Gallon fish only tank. No sump no skimmer. Cycle the tank week 4 no ammonia and nitrates are coming down. I have a nano 5 gallon tank with snails, hermits one star fish and a clown. My question is this I want to add everything including filter from one tank to the other to help with the bacteria growth but if I do will everything die. But if I add it later will it be a bio over load. Will everything die one way or another. Looking forward to the info.
Cheers Bruce