that link was helpful thanks. 36 gallon bow front running for five months upgraded from a 10 gallon{running for a year} using the live rock sand and all the inhabitants. filter:fluval 204,protein skimmer:skilter 250,i got a aqua-pump for the current,lighting:right now i'm using the fixture that came with the tank i'm buying a coral-life or a power-glo floresant bulb which is what i had on the 10 gallon im not sure what wattage i need for the 36 .i can't believe i neglected the lighting for so long that could be the reason why the coral-line on my live rock is starting to fade. water parameters:ph-8.2,nitrite-0.00ppm,nitrate10.00ppm,salinity-i.024,got to pick up a alkanity,phospate, and iodine test kits have to get back to you .tempature 76degrees F