I have a running 40 gallon tank with an eheim 2213 in it for my ray pups. Recently, i see that the single 2213 isnt doing enough filtration and i want to add a 2217 to it. How would i do it? Ive never added on filters before as ive always started off with way more than whats "recommended". Would the bacteria from the 2213 be enough to start the 2217 or would it recycle? Or do i have to cycle the 2217 in like a bucket or something and then add it in once its cycled? Any advice would help. Thanks.