Broken Hydrometers?

Hi guys I have purchased quite a few therm/hydrometers this week and none of them read hum in my tubs. The first four give no hum reading at all then I picked up 2 Acu-Rites today from lowes and they are both reading around 30% hum which I find to be wayyyyy to low considering the sub and plants and the visual condensation in the tub. Maybe i'm wrong but is there some math to this or a better them/hydro I can use?

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Originally Posted by Donald M

Hi guys I have purchased quite a few therm/hydrometers this week and none of them read hum in my tubs. The first four give no hum reading at all then I picked up 2 Acu-Rites today from lowes and they are both reading around 30% hum which I find to be wayyyyy to low considering the sub and plants and the visual condensation in the tub. Maybe i'm wrong but is there some math to this or a better them/hydro I can use?

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somebody nicely suggested that I try the digital ones! Maybe that will help? Cause my other isnt digital, and its CRAP!

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Originally Posted by GinaTheMachina

somebody nicely suggested that I try the digital ones! Maybe that will help? Cause my other isnt digital, and its CRAP!

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im sry they are digital

what kind of substrate are you using? Are you keeping a lid on top of the top? I just had the opposite problem with too much humidity in my tub. worse comes to worse you can always get a humidifier...thatll solve the problem.

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Originally Posted by tqmidget85

what kind of substrate are you using? Are you keeping a lid on top of the top? I just had the opposite problem with too much humidity in my tub. worse comes to worse you can always get a humidifier...thatll solve the problem.

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im using coco bark and forest moss and yes i keep the tops on the tubs and can feel the hum come out and there is constant condensation on the tub sides