The muck really is only cosmetic, i've found it does'nt really effect water quality unless it is uneaten food. The nitrrogen and other crap is in the water already not really the waste, I find in most of my plant tanks if i do the amount of water changes needed to keep the bottom clean I would hurt the bacterial cycle in the tank and cause more nitrogen than if leave it mucky... also because its hard to get in between the plants with the hose, looks more natural thoe with wood and live plants... I would suggest putting as many rows of 48" plant grow light bulbs as you can fit and heat coils on the bottom because most tanks especially tall tanks will get to cold on the bottom and all your plants will lose the foliage on the bottoms, heat will also bring nutrients to the bottom and the roots... put some nice rocks and drift wood on the bottom and a nice selection of plants and your tank will look sweet... My opinion is every tank should have live plants, even african rift lakes have plants... all aquatic environments have some form of plant life, even ponds and swamps will at least have algea...