.i think if u want to try lps try hammers, brains or bubbles.according to others,jewel or goniopora tends to extends its tentacles and seems healthy beginning but after a few months it tends to collapse.
Jus my two cents
Salifert,is the most accurate and give easy readings but be prepared to pay at least $30 for a kit.i use tetratest which is quite affordable,u may also try mini labour.
i think most of their nutrition is derived from photosynthesis via the zooxanthelle(dunno whether rite spelling).so provide them with light.few people bother to feed them.
Jus my 2 cents.
wad i intend for a sump is a 1ft tank,jus beside the main tank,i am currently using an overhead filter+wet and dry.BTW,theres nothing much to put in a 1ft tank.