I have 4 tanks... 2 had UGFs...that I have since
removed and have put a 1 cm layer of sand....
both these tanks have no plants except for floating
or a big glob of java moss.....
In the 55 gal that had a UGF, I used a pasta strainer
and removed the larger gravel and kept the smaller
stuff.... have about 1.25" of 2-3mm gravel and have
the bottom covered with java ferns and drift wood.
I will never go with another UGF....