Yeah I think the DCQ's are still making their way into US/Canada, not super easy to find there yet (there are a few listings though on ebay and amazon), though they've been out about maybe 9 months here in SEA I'd reckon.
I'm currently running a DCQ-3500 in my 115 gallon Kamfa tank (just goes to a Sunsun pre-filter then UV sterilizer). Works a charm and quiet as anything, the air pump is way louder. I plan to get another one of the same model to put inside this tank's internal corner filter (currently has a normal Sobo pump). I also have DCT & DCP pumps on other tanks, no problems and equally happy with them.
Here's a little video review of the DCQ-3500 if anyone's curious to watch (when it was in my Kamfa's then 88 gallon tank):
Side note: I mention about a suspected issued with the pump not reaching it's max power rating (28 watts) -- a viewer made the correct point that max wattage will be influenced by how much head pressure you have on the unit.
Thank you. I will check out the video when I get out of class.
It appears that the only difference between the DCP and the DCQ is the wavemaker capability. For a reef tank, I can see that being very useful and worth the extra money, but for a freshwater tank, I don’t think it’s really worth extra money. I would probably still get one though. Lol. If their prices were the same then it would be an easy choice. I do like the red color though. Maybe my son’s 29 gallon tank needs a sump now...