well i have one 6500k metal halide with one 20 watt actinic and im going to get another actinic soon (as soon as i can afford it ) For filtration i have a wet/dry filter and a protien skimmer... i cycled the tank with live sand and live rock so it was quick and painless. i use the return pump from the wet/dry for a power head and i aslo have a small rio for more circulation.....its a small 20 gal. tank so it creates alot of water movement.. the intake it custom made. The bottom is sealed with an endcap. The holes you refer to are the intake for the wet/dry filter. If you would like plans to make this your self just let me know and i will send you the link to where i got them.
nate_j actos15@hotmail.com