I DIY'd mine for about a quarter the price of the Spectrapure unit. Then I spent another quarter of the price fixing my DIY. Then lost about three times the price of the Spectrapure unit in corals and fish when my DIY failed. Just warning you now...
Spectrapure has some decent sales. There are others as well, but a fully engineered, working solution from the start is often the cheap way to go in reefing. Wish I'd learn that someday...
Jeff
LOL I know how that goes, I've had my share of DIY mistakes but i cant get out of the mindset.. I think my options are either to buy something like linked above, or just deal with replacing DI resin a little more frequently and leave the float valve in place.. I may end up buying that once I go through the majority of the 7.5lbs of DI resin I currently have.