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Originally Posted by adidas
I always thought you need to at least save maybe 20% of your water when you move the tank, or else won't it start a cycle?? I thought you need the established water because it has the good bacteria in it?
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Compared to the bacteria on your LR, there is little bacteria in the water. I would go with Steve's recommendation that you can start with all new water.
That being said, you will have to acclimatize your fish to the new water.
Also, about scrubbing your rock to get rid of hair algae... Make sure you rinse it really, really well in pails of old tank water. You don't want stray bits of hair algae to get into your new system.
Also, if you have bubble algae, DO NOT scrub it off. Doing so will break open the bubbles and possibly release spores (or whatever it is that they use to reproduce) into your new system and you will have much worse bubble algae in the new system. No amount of rinsing will get rid of the spores (or whhatever.) I can give you more details on bubble algae removal if you need it, just ask.
Also, understock where ever possible to avoid algae problems down the road.