Refratometer - My 2 cents worth

[russp]

I just got 1 off of ebay for $38 shipped from Quebec , Aquakits was the seller. I have to calibrate it yet but it looks good , the guy was really slow to ship though. I think it took about 4 weeks to get it here. I have been using the cheap plastic hydrometer up till now & I have 2 identical ones & they read about 4 points different on the same water sample so I split the difference. It will be interesting to see what the refractometer reads.