Figured I would go ahead and do a Filter Swap due to the size of my catfish compared to my Bio-Filter 2 1ft RTC X TSN Hybrids, 1 9" RTC, 2 6" Oscars with only a 5Gal bucket for My Bio-Filter so purchased a Rubbermaid tub For a DIY Filter for a total of 32Gal for my new Bio-Filter on a 55Gal grow out tank till they can go into the 800Gal Tank.. and planned to put already cycled media on top of new media and gonna use Seachems Stabilty & Prime Daily when needed just in case any spikes in the tank is their anything special that i need to do while making the swap.. im gonna check the Parameters daily till everything back to Normal leavin all orignal substrate and plant in the tank as well with BB already on them along with WC's when needed just switching to a bigger filter w/ more media for a larger bio-load hoping to add a couple Jau's and some RTC X Marble Hybrids soon...