I'm sure they have an Aqua-Tech 30-60:
http://ecx.images-amazon.com/images/I/51kaaWz6FnL._SL500_.jpg
They're good workhorse filters. A bit noisy, not terrible - but I wouldn't put them in the bedroom. I like them much better without the cartridges, instead I use a block of AC foam (like the one for the AC 70) on each side, and a bag of Biomax on top of each foam block. This way the filter media is rinseable and reusable, saving money and being more "green" of course
For what they are, those plastic grids with a palm full of carbon and a thin sheet of blue poly fiber, are overpriced and not very effective, IMO.
The main advantage of the Aqua-Techs over the Penguin and Emperor filters is the shape of the intake tube - round, not flat. This makes them clog much less easily than the Marineland or Penguin filters. The bio-wheels will eventually stop turning on those other filters, so I find them to be of limited usefulness.
I have a Penguin 350 and an Aqua-Tech 30-60 running on my 55 gallon goldfish tank. Both of them were set up at the same time. It's been a month now, and the Penguin 350 is already losing flow (mind you, it has the cartridges in it)
The Aqua-Tech is still going strong
