Hello all! I have a 6.5 gallon tank with a few tetras and I am looking to upgrade to a 20 gallon soon. My question is what is the best way to do this? I was planning on running my current established filter with the new filter in the bigger tank to help the new filter build up its biofilter? I was also planning on using all the current items in the tank as well, like the substrate and decorations. I will probably have to add new substrate to it since it will be significantly larger. Any other suggestions or a better way than this? Thanks!