I treated my fish to a new fx5 it should be arriving in a few days i have a few questions..... 1st off how long should i run both the new and old filters together. 2how do you remove the internal filter 3 i have messy fish what media would you use in the fx5 i have 1000 grams of bio rings and some carbon with some fine pads... Would this work and were should i put each stage..... Sorry for all the questions but looking forward to hearing the answers!