I got it from the digital aquatics online store for about $410 dollars Canadian(that includes shipping), it's package three so it comes with everything i need.
it comes with expandability possibilities, with 3 ports, so you can hook up PC4's(four plug outlet),SL1's (for salinity,orp,and ph probes. holds up to 2 probes) and MLC's (a LED moonlight type device)
since this expandability is available, they set up 3 different bundles.
bundle 1 comes with:
1 x Head unit
1 x PC4 (4 outlets)
1 x temperature probe
bundle 2 comes with:
1 x Head unit
1 x PC4 (4 outlets)
1 x SL1 (Inputs: pH, ORP, Temperature, 2 x Switch Ports)
1 x Temperature probe
bundle 3 comes with:
1 x Head unit
2 x PC4 (total of 8 outlets)
1 x SL1 (Inputs: pH, ORP, Temperature, 2 x Switch Ports)
1 x Temperature probe
1 x FREE Digital Aquatics pH probe
here's the digital aquatics site:
http://www.digitalaquatics.com/index.php