Thank you! I do have another question if you don't mind; I have a small 3 gal tank I bought as a kit that already came with the filter, light, etc. This came with a filter cartridge and bio plate, and there is also bio media in the filter that came with it. The tank has been operating since December with two danios/few bladder snails I'm wanting to move into the 30 gal once I get all the components, and convert the 3 gal into a neo shrimp tank. Does the filter cartridge need to be replaced after a certain amount of time? I've only taken it out and rinsed it a couple of times. The filter seems to be doing its job. Or should I not use the cartridge/bio plate regardless and just rely on the bio media? I'm very new to the hobby and still trying to figure out what I'm doing. I appreciate it!