Convict2161
Aquarium Advice Addict
Test your parameters but I wouldn't worry about it.
Ph looks looks like 8
Ammonia 0
Nitrite 0
Nitrate 20
Specific gravity a hair under 1.022
so it should be about 1.026
ideally you want 1.024-1.026, Like I've said, I keep my tank at 1.026
So with it reading a hair under 1.022 it actually is a hair under 1.026
Sounds right to be. Have your LFS test it again IMO just to make sure your still in that 2 mark off range. I never trusted those things. Take 5 different hydrometers and you'll get 5 different readings. I've done it. I've had the 100 dollar digital meter, hydrometers, refractometers probs etc... All gave different readings.
This was the best and most accurate one for me...
http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4690+9957&pcatid=9957