i am going to be using new substrate so I wont have as much benificial bacteria as my 75 gallon I am currently checking the new water daily to be sure temp, ph, nitrates, nitrites are all similar to the smaller tank then im going to put in the substrate and plants from old tank then the following day im going to take off the filter off the small tank and put it on the big tank for about 2 hours prior to transferring fish over hopefully this will be okay. I am just real nervous about this process because this is my second tank and I am only 4-5 months into the hobby.