Does anyone recommend the reverse flow under gravel filter set up? I want to put gravel back into my 55 and do not want to use a normal flow under gravel filter. I removed the gravel just to operate a cleaner tank. It is clean but I don't like the way it looks. I figure if I don't use something under the gravel too much debri will accumulate. I am not one of these guys that can spend half an hour siphoning every evening. I currently am using a large in tank sponge filter with a marineland outside bio wheel filter and am satisfied with the water quality. What do ya think of the undergravel reverse flow system?