First difference is catalyst concentration. Sulferox iron concentration is usually 2%; LO-CAT is usually about 0.1% to 0.05%. The more dilute catalyst system of the LO-CAT has benefits in system stability, ease of operation and catalyst consumption. LO-CAT also uses a patented chelate system that is more resistant to oxidation; further enhancing system stability and catalyst cost. The result is that LO-CAT chemical cost is one-half to one-third of a Sulferox unit, and will have a more stable operation. The LO-CAT unit will have higher circulation rates and slightly higher power costs.