hi imgoing to set up a 40 g discus growout tank and i dont want to do 50% water changes a day but instead maybe 2 40% water changes a week since i only have time to change water wensdays and sundays since i got enough time to maintnance all my tanks so would tile for a discus tank be good because with rocks alot of sh#t stay inbetween it and i dont want my discus strees due to ammonia and i dont like the way bare bottom looks so i was going to put nice tile but with rocks bacteria can grow would bacteria be abe to grow on til;e since tile is a rockyer surface similiar to gravel by the way theres going to 4-6 2 inch discus and im running an emperor 400 the one rated for 100 gallons and i might be running a sponge filter rated for 60 gallons for extra biological filtration so does his all sound gewd or what do u reccomend for water changes and fedback thank u