How long should cycling take if I’ve used things from a previously established tank?
We have been cycling our new 3″ tank (200L, 52 gallons) for a week now. we now have been utilising the filtration within previously set up tank and a number of ornaments from it too. I’d say 20% of the drinking water is within old tank as well. Since the filtration already has set up germs levels inside, how fairly long do you think cycling will take? i had been likely to wait about 3 many weeks but I’m not positive anymore…
Thanks to everyone who aids 
If you have put in a working filter from an established tank then you have moved some working cycle into the tank instantly.
Best option is to get some fish in there with it. If you leave the filter in there without a source of ammonia then the cycle will actually die off.
If you have a pre-cycled filter then your tank is safe for some fish from day one. Just add them in stages to build up the full level of cycle in the tank.
Ian
i agree with the person above, but what you should do is grab some of the gravel from the established tank into the new one because benificail bacteria develops within the filter and gravel so that will speed it up even more, from what i heard this process should take about 1-2 days but i geuss either a 55 gallon will take more time to cycle, or because there is no trace of ammonia in the tank, i suggest just putting one of your fishes in there for a few hours afeter feeding and once it has pooped, your gonna see great results.
i recently purchased a brand new 60 gallon and everything else i need for it is ne .. filter heater etc… i put all the gravel plants and decoration from my already cycled 30 gallon in it .. i also put the filter from my 30 gallon in it … everyone was telling me that it would take a few days to cycle… but now im going towards 2 weeks and it is still not cycled so in order for my fish not to get injured a just check the nitrate levels and when it gets too high i do a 50% water change ,,