I use a coral box DC500.. It works ok, but there are issues to be aware in advance about;
- the slots on the nylon screws that hold the bottom plate on to the main body strip if you use the wrong sized screwdriver.
- the DC2000 pump is good, so long as you assemble it correctly, with the ceramic bushes rubbing tight up against the propeller shoulder. This stops any precipitation due to heat occurring within the ceramic bearing which causes the pump to fail.
- If at max motor speed, you need to remove the screw that's on the underside of the air silencer to allow more are in, this makes it noisier. (I now run mine without a silencer and via a tube to the outside air to increase pH and eliminate noise)
- you need to use a filter sock or pre filter before the pump inlet, otherwise it doesn't take long for the impeller to get partially clogged and reduce its flow/air movement.
One big plus point (apart from its relatively cheap price is that it has a drain tube to the underside of the collection cup.
For a cheap skimmer its good, but next time I would personally spend a little more money and get something better. (bubble magnus or waveline)