I wrote to SWC as I just received a new Skimmer
DNW-150 6530. The pump didn't have a sticker on it to indicate what type of pump it was. I thought it was a Hailea as it came in a box with Hailea written on it.
I wrote to them and they replied the pump is the Opti 2000 They do not come with stickers when we import them.
Could they have meant it was a OTP-2000 as I have never heard of a OPTI 2000.