hard core nova

i feed my corals twice a week live plankton flow is a medium flow i have 2 turbines in the tank tks

i have tested for all of the above and everything is all good the fish in the tank are 4 clowns 1 lawnmore blenny 1 regal tang 1 fox face 4 blue leg crab 2 blue chromes 1 oriental sweet lips very small the lighting is metal highlite the flow is a medium flow the tank has a 50 gal sump protine skimmer the hammer and torch do look like they are wasting away little by little all the corals do not touch each aother and they all have there own flat spot on the live rock i also have 2 brain coralslike i said its only hammer and toruch corals that dont live for more than 2/3 weeks tks

i have been into saltwater tanks now for a year and a half i have a 150 gal reef and fish and a60 gal fish only tank can someone out there tell me why torch corals and hammers keep dying in my reef tank the all the test i do for reef are telling me everything should be where there supposed to be i love the looks of those corals i have candy corals leathers aninomies flower pots and they are all doing very well please help me with this tks

ther is a very good test kit for salt water also a good reef kit forgot the name i got the kits at pet smart and you should wait 4 weeks before you add any fish to the tank