Hygrometer Vs Hydrometer

[grayshark1956]

Just wanted to note I've been writing/asking about salt water, crabs, bettas, etc. I did not realize I was also asking about a hygrometer when I meant to ask about hydrometer! Just wish I could find one in our town, the hardware stores don't sell them ( at least the ones I called ) so I'll keep looking for a hydrometer and read more about ammonia and marine salt. Oh, and what people food to offer mini fiddler crabs besides lettuce or carrots. I doubt they would eat spagetti but might like those fake crab sticks? Maybe I can make homemade shrimp jerky...just a thought.