On our most recent mailorder supply order, we bought a digital marina thermometer. the one that has a high and low temp warning and reminder alerts . Up until now all we have ever used was the old fashioned floating thermometer. There is a big difference the readings in both. The digital reads 84.0 F and the old glass one reads 77 F . How accurate are the digital probes that go in the tank? The hydor heater is only reading 73 F so I know that's not that accurate.
Also, we purchased a Vertex refractometer to replace our old hydrometer. The refractometer shows the water is way high .028 . and on the hydrometer it is reading .023. I know the hydrometer is not know for being the most accurate or reliable tool, but we were really surprised by the numbers. Any suggestions on what time span should I bring the salinity back down?
Thanks!
Nicole
Also, we purchased a Vertex refractometer to replace our old hydrometer. The refractometer shows the water is way high .028 . and on the hydrometer it is reading .023. I know the hydrometer is not know for being the most accurate or reliable tool, but we were really surprised by the numbers. Any suggestions on what time span should I bring the salinity back down?
Thanks!
Nicole