r u using di water to kick start ur tank.? if not i will recommend u to run a fluridise reactor with PO4 remover in the chamber..
for testkit u can try getting salifert and tropic marine. this 2 are the reliable one which alot of reefers, including myself is using. and ya.. the price of salifert depends on wad type of testkit u getting.. price range from $20-$30++
hope wad i provided will help u.. and do post a pic of ur tank in the member's showcase where lots of senior reefers, or new reefers can help u in any knowledge they know.