Was wondering what some of you thought about having only gravel in a planted aquarium. I have an existing 40 gallon with 3mm-5mm size gravel, would like to add plants but not real interested in clearing out inhabitants and gravel to add Flourite or whatever. I have ordered the full line of Seachem Flourish products and the Sanders Floramat CO2 Generator. If I add Laterite balls to the base of my plants do you think that would be sufficient?