Check it out.I don't have Koli Loaches,but this is my heavily planted,dirt substrate,T5 HO,perssurized CO2,10 gallon tank.It is totally overstocked with neon and glowlight tetra.
The pygmy sword is new,so after a while it will hopefully fill out the substrate.The dirt is under the gravel
http://i361.photobucket.com/albums/o...n/P8230003.jpg