Replacing Penguin 150 with BIO-Wheel

[mond]

I purchased a replacement Marineland Penguin 150 with BIO-Wheel, and I would like some thoughts on what to do with the new BIO-Wheel. Is there a way to condition it, so to speak, while phasing out the old one? Is the old one the better way to go?

Thanks for any quick advice!
mond

[scuba dude]

Tank fully cycled? If not you could place the old on in the tank since it holds BB and install the new one in the filter

[Hibiscusmile]

I like to leave all as is and just put new one in tank for a week or so and then change them.

[mond]

Tank is fully cycled and has 4 long fin tetras. All chemical levels are good.

Hibiscusmile, when you say put a new one in the tank, do you mean the whole filtration system (so two are running for a week) or just a new BIO-Wheel? I was thinking of just floating the new BIO-Wheel in the tank for a week or two before swapping them out, but only keeping 1 filter pump.