Tank Stocking?

[SirCastic]

So im' going to upgrade to a bigger tank (90 maybe 100), i was wondering if i took the old filtration from my 55 and all the water from it + gravel i could really jump start the cycle and maybe skip over it? treating like a 50% water change of course. Then i would add the rest as dechlorinated water. will this work? or will i still need to cycle?

Also i was thinking of getting a Black ghost knife when i upgraded, currently in my 55 i had 5 giant danios, 3 glass catfish, 5 tiger barbs, 6 mollies ( 3 black 2 dalmation 1 gold dust) 2 red wag platies, red tailed shark, blue crayfish, ghost shrimp, fiddler crab, chinese algae eater, 5 kuhli's and 1 stick catfish. WIll the BGK be aggressive? will it be enough room for him if it isn't? If not could i go with a dinosaur birchir eel instead? or just drop the eels altogether and get some more communities?

Any help is appreciated!

 

[thereverendturtle]

Yes, moving everything to a larger tank, would be like doing a large water change. Are you adding another filter? As for the bgk, they get large up to 18"+ in an aquarium. Although they have small mouths, they are able to eat smaller fish and shrimp. I have several sterbai corys that are missing one or both eyes, because they were kept with bgks at a lfs. As for the bichirs, leave them out all get large and predatory. If you want an oddball, maybe go for an elephantnose or perhaps a specialty pleco.