[stephane]

PH meter is the only one you realy need IMO
Calcium and alkalinity are good option other are useless cycle your tank well and you will never need to test amonia or nitrite

if you have enought live rock or a DSB you will never have nitrate so why test

silicate,phosphate even if you have in your tank you will praticaly never have a read because algea will consume it in a chain

copper completly useless in a reef

but as Gobygirl said it could made you more confident to test and she made good point so if you have the money go for it but the first to buy is a PH meter.

hope this will help

[ 04 July 2002, 14:28: Message edited by: stephane ]