Once my PS234 reagents run out I think I'll buy a Lamotte ColorQ (if the reviews are good).

http://www.lamotte.com/pages/pool/newprod.html

http://www.lamotte.com/pages/common/...truct/2056.pdf

http://www.askalanaquestion.com/elec...ters_store.htm

It's Expensive (~$145 delivered) but it has enough material for 140 FC, TC, PH, ALK, CH tests and 50 CYA tests which should be good for 3 seasons.