I'm going sponge filter on an ambush predator tank. I think this will work well. I also would like to use an algae scrubber but am still researching to know if there will be an issue with plant health if I use one. My reasoning for a sponge filter is to reduce flow power in concentrated areas. I want the suction spread out over volume as well as the output of my powerheads through a spray bar to not be concentrated burst. This will allow my ambush predators to not fight a current or be stressed as they are typically found in slow to stagnant waters. Ideally, I will have the flow displaced throughout the tank well enough to not be concerned with dead spots as these fish will hide in those and be susceptible for other reasons. I am curious if I should use a third filter to clean the top of the water and if it should be different than a sponge filter.