>  Tank parameters are as follows:
>
>Salinity: 1.022 - 1.024
>pH: 7.9(night) - 8.2(day)
>Calcium:420-450
>Alk: 4.0meqs/11.2dkh
>Nitrates: 0
>Temp: 79-80 constant
>
>Lighting:MH/VHO Combo - 10 watts per gallon
>
Hi there
        What type of hydrometer are you using? Have you compared its 
readings against a known good glass hydrometer? I have seen those 
plastic floating type hydrometers be out as much as .007 low on its 
reading which could make an actual true reading be 1.030. Just my 2� 
worth.

Wayne.

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