I've got a 50 gallon that has a hang on back with filter media from my 29 gallon and has been running for two days. Would it be safe to put a gourami or angel fish from my 29 gallon in there to help get the water cycled quicker? I plan on getting plants next weekend. I'm wanting to get the two fish separated as quick as I can because the angelfish keeps getting aggressive with the gourami from egg-laying.