As far as I am aware Ionics us Aquatec pumps, with their own label.
http://www.aquatec.com. (not the one in Scotland)
The problem with all these 12v pumps is they are being used for a purpose they were not designed for, so regardless what the sales man told you, you should expect a high failure rate. We normally give pumps a 2 year life and if they last longer your doing well, but if you run them long and hard they can pack up within a year.
So I would include in you budget & maintenance a new pump every 18 months.
And I know that some one will now post a reply stating that they have a pump for 17,000 years and its sill going OK, my statements are generalisations from over 15 years of using these pumps.
steve@freshwatersystems.co.uk