i get the same thing the tank i am using 7 and 10 and my calcium reactor i am using 4 and 7 and they are both in the tank now as i am waiting for the reactor and there is a difference of .20 between the two with the 4 and 7 probe reading higher probes are both 2 months old and re calibrated a few times as i could not believe it
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360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras
360 Reef Tank
Last edited by BlueTang<3; 04-11-2010 at 09:24 PM.
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