I'm in the final stages of prep for a 110 gallon, 30 inch tall, aquarium. I want it to be a community low-tech aquascape, heavily planted but no CO2 - low-tech/Walstad style. The advisor I've been working with at a local shop steered me towards the fluval 407 instead of the fx4 given the size of my tank (and shorter stand). Since the 407 is rated at 50-100 gallons I thought I could get away with 1. I have a custom stand that has spots for two 407s - the thought was having redundancy and more control over flow. Any recommendations/thoughts?