slow but steady fiush deaths

Question
My 45 gallon, live saND, LIVE RICK TANK HAS BEEN SET UP SINCE fEBRUARY- HAS PROTEIN SKIMMER, EXCELLENT PUMP, FLORESCENT LIGHT (6 HOURS A DAY). wATER20%) CGANGED EVERY TWO IR THREE WEEKS BY EXPERIENCED AQAURIUM MAN.
i'VE YET TO KEEP FISH VERY LONG. hAVE TESTED WATER FIR aMNONIA, NITITES, ETC- ALL ARE FINE. wHENEVER NEW FISH ASDDED WE HAVE DEATHS. nOW ONLY HAVE 3 LITTLE CLOWNS, SNAILS, HERMITS AND FEATHER DUSTER. hAVE LOST ARUGA BUTTERFLY, CORAL BEAUTY, RICK BEAUTY ROYAL GRAMMA, YELLOW PYRAMID, RECENTLY. lOST YELLOW TANG, KOHL TANG, BLENNIES HAWKFISH, FAIRY WRASSE LEOPARD WRASSE, SAND GOBBI, OVER PAST MONTHS. gENERALLY, WHEN ALIVE, HACE 6-8 FISH IN TANK.
wHAT IS WRONG! MY 'EXPERT' CLAIMS ALL DIFFERENT, CRAZY THINGS. NOW BLAMES TEMPERATURE SURGES ON WARM DAYS.
HELP11111

Answer
Hi Marian Dunn,

I would recommend to give your saltwater aquarium between 8 to 10 hours of lighting per day, keeping dawn to dusk in mind, when timing the lights.

I would also recommend to look for a new aquarium maintenance provider.

I also recommend to quarantine all new fish, for a minimum of two weeks before adding them to your main aquarium.

Sincerely,
David