"Gary"  wrote in message 
news:gZnud.34535$up1.5754{at}text.news.blueyonder.co.uk...
> Hello,
>
> I have just purchased a 300 litre aquarium to be used for Tropical 
> freshwater.
>
> I already have an established 100 litre aquarium, and I do partial water 
> changes every 4 or 5 days.  Can I kick start this aquarium with 50 litres 
> of the other tanks water?  Or should I start afresh?
>
> Regards,
>
> Gary.

Using the 50 litres of old tank water would help kick start the tank, but 
better would be some filter media or gravel in a mesh bag placed into the 
new tanks filter. If by chance, you're using Emperor 400's on both tanks, 
you can run them with one new / one old bio wheel in each tank. The Eheim 
liberty also have biopads that can be set up one old, one new for a new 
tank.
This can reduce and almost eliminate the cycle process depending on initial 
fish loading and the adequacy of your current biological filtration. Don't 
remove so much biological filtration that you cause a mini-cycle in your 
established tank.
Tim
www.fishaholics.org
---
þ RIMEGate(tm)/RGXPost V1.14 at BBSWORLD * Info{at}bbsworld.com

---
 * RIMEGate(tm)V10.2áÿ* RelayNet(tm) NNTP Gateway * MoonDog BBS
 * RgateImp.MoonDog.BBS at 12/10/04 9:34:03 PM