I'm thinking of getting a harlequin to take care of my plague of asterinas. Does anybody have experience keeping them with serpent stars. The link above says they are scared of them, but I don't want to risk loosing my bright red serpent.
I have a Deltec MCE300 that I used for about 6 months (I'd have to check my receipt). Not really trying to sell it but if the price is right I may sell it.
I like the Deltec. When I had my 20G, I was running a Deltec MCE300 and it pulled out dark green smelly skimmate. Although the MCE300 is rated for a 90 gallon at normal bioload, I would go with the MCE600. But they do cost a fortune.